メンバーごとの業績についてはメンバーのResearcher IDを参照ください

2024 papers

Effect of Film Morphology on Electrical Conductivity of PEDOT:PSS.
Aditya Saha, Daisuke Ohori, Takahiko Sasaki, Keisuke Itoh, Ryuji Oshima and Seiji Samukawa
Nanomaterials 14, 95-1-11 (2024).
DOI: 10.3390/nano14010095

2023 papers

Anomalous vortex dynamics in the spin-triplet superconductor UTe2.
Y. Tokiwa, H. Sakai, S. Kambe, P. Opletal, E. Yamamoto, M. Kimata, S. Awaji, T. Sasaki, Y. Yanase, Y. Haga and Y. Tokunaga
Phys. Rev. B 108, 144502-1-5 (2023).
DOI: 10.1103/PhysRevB.108.144502

Effect of Interfacial Oxide Layers on Self-Doped PEDOT/Si Hybrid Solar Cells
Aditya Saha, Ryuji Oshima, Daisuke Ohori, Takahiko Sasaki, Hirokazu Yano, Hidenori Okuzaki,Takashi Tokumasu, Kazuhiko Endo and Seiji Samukawa
Energies 16, 6900-1-14 (2023).
DOI: 10.3390/en16196900

Change of superconducting character in UTe2 induced by magnetic field
K. Kinjo, H. Fujibayashi, S. Kitagawa, K. Ishida, Y. Tokunaga, H. Sakai, S. Kambe, A. Nakamura, Y. Shimizu, Y. Homma, D. X. Li, F. Honda, D. Aoki, K. Hiraki, M. Kimata, and T. Sasaki
Phys. Rev. B 107, L060502-1-5 (2023).
DOI: 10.1103/PhysRevB.107.L060502

Field-induced magnetic structures in the chiral polar antiferromagnet Ni2InSbO6
Y. Ihara, R. Hiyoshi, M. Shimohashi, R. Kumar, T. Sasaki, M. Hirata, Y. Araki, Y. Tokunaga, and T. Arima
Phys. Rev. B 108, 024417-1-8 (2023).
DOI: 10.1103/PhysRevB.108.024417

Thermal Transport of a Layered Organic Mott Insulator k-(ET)2Cu[N(CN)2]Cl
Tetsuya Furukawa, Hiromi Taniguchi, and Takahiko Sasaki
JPS Conf. Proc. 38, 011143-1-5 (2023).
(Proceedings of the 29th International Conference on Low Temperature Physics (LT29))
DOI: 10.7566/JPSCP.38.011143

Infrared Magneto-optical Kerr Effect Measurements by Polarization Modulation Method in Anisotropic Magnets
Satoshi Iguchi, Yuka Ikemoto, Hiroki Kobayashi, Hideaki Kitazawa, Hirotake Itoh, Shinichiro Iwai, Taro Moriwaki, and Takahiko Sasaki
JPS Conf. Proc. 38, 011148-1-6 (2023).
(Proceedings of the 29th International Conference on Low Temperature Physics (LT29))
DOI: 10.7566/JPSCP.38.011148

Microscopic evidence for preformed Cooper pairs in pressure-tuned organic superconductors near the Mott transition
Tetsuya Furukawa, Kazuya Miyagawa, Mitsunori Matsumoto, Takahiko Sasaki, Kazushi Kanoda
Phys. Rev. Research 5, 023165-1-17 (2023).
DOI: 10.1103/PhysRevResearch.5.023165

Field Induced Multiple Superconducting Phases in UTe2 along Hard Magnetic Axis
H. Sakai, Y. Tokiwa, P. Opletal, M. Kimata, S. Awaji, T. Sasaki, D. Aoki, S. Kambe, Y. Tokunaga, and Y. Haga
Phys. Rev. Lett. 130, 196002-1-6 (2023).
DOI: 10.1103/PhysRevLett.130.196002

2022 papers

Phonon renormalization effects accompanying the 6 K anomaly in the quantum spin liquid candidate k-(BEDT-TTF)2Cu2(CN)3
Masato Matsuura, Takahiko Sasaki, Makoto Naka, Jens Mueller, Oliver Stockert, Andrea Piovano, Naoki Yoneyama and Michael Lang
Phys. Rev. Research 4, L042047-1-6 (2022).
DOI: 10.1103/PhysRevResearch.4.L042047

Monomer Mott Insulator (BEDT-TTF)Cu[N(CN)2]2 as a Potential Nodal Line System
Naoki Yoneyama, Muhammad Khalish Nuryadin, Takao Tsumuraya, Satoshi Iguchi, Takahiro Takei, Nobuhiro Kumada, Masanori Nagao, Isao Tanaka, Takahiko Sasaki
J. Phys. Soc. Jpn. 91, 113704-1-4 (2022).
DOI: 10.7566/JPSJ.91.113704

Crystal Structures and Conducting Properties of Mott Insulator (BEDT-BDS)PF$_{6}$: Selenium Substitution Effect in the Parent (BEDT-BDT)PF$_{6}$.
Tomofumi Kadoya, Masaharu Shishido, Shiori Sugiura, Toshiki Higashino, Keishiro Tahara, Kazuya Kubo, Takahiko Sasaki and Jun-ichi Yamada.
Chem. Lett. 51, 683-686 (2022).
DOI: 10.1246/cl.220148

Optical Conductivity Spectra of Charge-Crystal and Charge-Glass States in a Series of $\theta$-Type BEDT-TTF Compounds.
Kenichiro Hashimoto, Ryota Kobayashi, Satoshi Ohkura, Satoru Sasaki, Naoki Yoneyama, Masayuki Suda, Hiroshi M. Yamamoto and Takahiko Sasaki
Crystals 12, 831-1-10 (2022).
DOI: 10.3390/cryst12060831

Mechanisms of the antiferro-electric ordering in superprotonic conductors Cs3H(SeO4)2 and Cs3D(SeO4)2
Hiroshi Matsui, Kakeru Fukuda, Saki Takano, Yuka Ikemoto, Takahiko Sasaki and Yasumitsu Matsuo
J. Chem. Phys. 156, 204504-1-8 (2022).
DOI: 10.1063/5.0088230

Comparison of the charge-crystal and charge-glass state in geometrically frustrated organic conductors studied by uctuation spectroscopy
Tatjana Thomas, Tim Thyzel, Hungwei Sun, Jens Mueller, Kenichiro Hashimoto, Takahiko Sasaki, Hiroshi M. Yamamoto
Phys. Rev. B 105, 205111-1-12 (2022).
DOI: 10.1103/PhysRevB.105.205111

Involvement of structural dynamics in the charge-glass formation in strongly frustrated molecular metals.
Tatjana Thomas, Yohei Saito, Yassine Agarmani, Tim Thyzel, Kenichiro Hashimoto, Takahiko Sasaki, Michael Lang, and Jens Mueller.
Phys. Rev. B 105, L041114-1-6 (2022).
DOI:10.1103/PhysRevB.105.L041114

2021 papers

Magnetic Torque due to Anisotropic Diamagnetism in Neutral BEDT-TTF Crystals
Shinya Uji, Taichi Terashima, Shiori Sugiura, Satoshi Iguchi, Takahiko Sasaki, Kenichiro Hashimoto, Masaaki Shimozawa, Naoki Yoneyama, and Reizo Kato.
J. Phys. Soc. Jpn. 90, 113708-1-4 (2021).
DOI: 10.7566/JPSJ.90.113708

Emergence of unconventional spin glass-like state in k-(ET)2Cu[N(CN)2]Cl by introducing weak randomness
R. Yamamoto, T. Furukawa, K. Miyagawa, T. Sasaki, K. Kanoda and T. Itou.
Phys. Rev. B 104, 155107-1-7 (2021).
DOI: 10.1103/PhysRevB.104.155107

Pairing interaction in superconducting UCoGe tunable by magnetic field
K. Ishida, S. Matsuzaki, M. Manago, T. Hattori, S. Kitagawa, M. Hirata, T. Sasaki, and D. Aoki
Phys. Rev. B 104, 144505-1-9 (2021).
DOI: 10.1103/PhysRevB.104.144505

Variation of Charge Dynamics Upon Antiferromagnetic transitions for the Dirac Semimetal EuMnBi2.
H. Nishiyama, H. Sakai, K. Nakagawa, N. Hanasaki, S. Ishiwata, H. Masuda, M. Ochi, K. Kuroki, S. Iguchi, T. Sasaki, Y. Ikemoto, T. Moriwaki, K. Ueda, Y. Tokura and J. Fujioka.
Phys. Rev. B 104, 115111-1-7 (2021).
DOI: 10.1103/PhysRevB.104.115111

Dihedral-Angle Dependence of Intermolecular Transfer Integrals in BEDT-BDT-Based Radical-Cation Salts with theta-Type Molecular Arrangements
Tomofumi Kadoya, Shiori Sugiura, Toshiki Higashino, Keishiro Tahara, Kazuya Kubo, Takahiko Sasaki, Kazuo Takimiya and Jun-ichi Yamada.
Crystals 11, 868-1-9 (2021).
DOI: 10.3390/cryst11080868

Elucidation of local structure deformation in k-(BEDT-TTF)2Cu[N(CN)2]Br by x-ray fluorescence holography
Artoni Kevin R. Ang, Riho Marumi, Ayana Sato-Tomita, Koji Kimura, Naohisa Happo, Kazuto Akagi, Takahiko Sasaki, and Kouichi Hayashi
Phys. Rev. B 103, 214106-1-11 (2021).
DOI:10.1103/PhysRevB.103.214106

Charge Ordering and pi-d Interaction in Electron Doped 3/4-Filling Molecular System a"-(BEDT-TTF)2Rb2xCo(SCN)4(x = 0.6)
Satoshi Iguchi, Syuhei Yamada, Ryota Kobayashi, Koutaro Morita, Yuki Kudo, Megumi Kurosu, Naoki Yoneyama, Yuka Ikemoto, Taro Moriwaki, and Takahiko Sasaki
J. Phys. Soc. Jpn. 90, 074701-1-8 (2021).
DOI: 10.7566/JPSJ.90.074701

Anion Arrangement Effects on Electronic States of k-type BEDT-TTF Compounds
Yuto Nakamura, Naoki Yoneyama, Takahiko Sasaki, Takaaki Hiramatsu, Yukihiro Yoshida, Gunzi Saito, Hideo Kishida
J. Phys. Soc. Jpn. 90, 054703-1-7 (2021).
DOI: 10.7566/JPSJ.90.054703

Enhanced superconducting properties of double-chain based superconductor Pr2Ba4Cu7O15-d synthesized by citrate pyrolysis technique
Kazuma Honnami, Michiaki Matsukawa, Tatsuya Senzaki, Tomoki Toyama, Haruka Taniguchi, Koichi Ui, Takahiko Sasaki, Kohki Takahashi, Makoto Hagiwara and Fumihiko Ishikawa.
Physica C 585, 1353869-1-5 (2021).
DOI:10.1016/j.physc.2021.1353869

Strongly correlated superconductivity in a copper-based metal-organic framework with a perfect kagome lattice.
T. Takenaka, K. Ishihara, M. Roppongi, Y. Miao, Y. Mizukami, T. Makita, J. Tsurumi, S. Watanabe, J. Takeya, M. Yamashita, K. Torizuka, Y. Uwatoko, T. Sasaki, X. Huang, W. Xu, D. Zhu, N. Su, J.-G. Cheng, T. Shibauchi, K. Hashimoto.
Science Advances 7, eabf3996-1-7 (2021).
DOI: 10.1126/sciadv.abf3996

Nonmonotonic Pressure Dependence of the Lattice Parameter a in the Quasi-one-dimensional Superconductor Pr2Ba4Cu7O15-d.
Haruka Taniguchi, Yuya Nakarokkaku, Riku Takahashi, Masatoshi Murakami, Atsuko Nakayama, Michiaki Matsukawa, Satoshi Nakano, Makoto Hagiwara and Takahiko Sasaki
J. Phys. Soc. Jpn. 90, 015001-1-2 (2021).
DOI: 10.7566/JPSJ.90.015001

2020 papers

Large Thermal Conductivity due to Spins in the Two-Dimensional Spin System LaSrFeO4.
Eiki Komatsu, Takayuki Kawamata, Masatsune Kato, Takahiko Sasaki, and Yoji Koike
J. Phys. Soc. Jpn. 89, 114603-1-6 (2020).
DOI: 10.7566/JPSJ.89.114603

Formation of nanoscale polarized clusters as precursors of electronic ferroelectricity probed by conductance noise spectroscopy
Jens Mueller, Satoshi Iguchi, Hiromi Taniguchi and Takahiko Sasaki.
Phys. Rev. B 102, 100103(R)-1-5 (2020).
DOI: 10.1103/PhysRevB.102.100103

Petahertz non-linear current in a centrosymmetric organic superconductor
Y. Kawakami, T. Amano, H. Ohashi, H. Itoh, Y. Nakamura, H. Kishida, T. Sasaki, G. Kawaguchi, H. M. Yamamoto, K. Yamamoto, S. Ishihara, K. Yonemitsu and S. Iwai
Nature Communications 11, 4138 (2020).
DOI: 10.1038/s41467-020-17776-3

Two-dimensional radical-cationic Mott insulator based on an electron donor containing neither tetrathiafulvalene nor tetrathiapentalene skeleton
Tomofumi Kadoya, Shiori Sugiura, Keishiro Tahara, Toshiki Higashino, Kazuya Kubo, Takahiko Sasaki, Kazuo Takimiya, and Jun-ichi Yamada.
CrystEngComm 22, 5949-5953 (2020).
DOI: 10.1039/D0CE00878H

Magnetic field dependence of novel gap behavior related to the quantum-size effect
Tomonori Okuno, Yuta Kinoshita, Satoshi Matsuzaki, Shunsaku Kitagawa, Kenji Ishida, Michihiro Hirata, Takahiko Sasaki, Kohei Kusada, Hiroshi Kitagawa.
J. Phys. Soc. Jpn. 89, 095002-1-2 (2020).
DOI:10.7566/JPSJ.89.095002

Anisotropic magnetic excitations from single-chirality antiferromagnetic state in
Ca-kapellasite.
Y. Ihara, H. Yoshida, K. Arashima, M. Hirata and T. Sasaki.
Phys. Rev. Research 2, 023269-1-5 (2020).
DOI:10.1103/PhysRevResearch.2.023269

Phonon-assisted proton tunneling in the hydrogen-bonded dimeric selenates of Cs3H(SeO4)2.
Hiroshi Matsui, Kazuki Shimatani, Yuka Ikemoto, Takahiko Sasaki, and Yasumitsu Matsuo
J. Chem. Phys. 152, 154502-1-10 (2020).
DOI:10.1063/1.5145108

Signature of band inversion in perovskite BaSn1-xPbxO3 thin-film alloys.
Junichi Shiogai, Takumaru Chida, Kenichiro Hashimoto,Kohei Fujiwara, Takahiko Sasaki, and Atsushi Tsukazaki.
Phys. Rev. B 101, 125125-1-5 (2020).
DOI:10.1103/PhysRevB.101.125125

Quantum disordering of an antiferromagnetic order by quenched randomness in an organic Mott insulator.
Mizuki Urai, Kazuya Miyagawa, Takahiko Sasaki, Hiromi Taniguchi, and Kazushi Kanoda
Phys. Rev. Lett. 124, 117204-1-6 (2020).
DOI: 10.1103/PhysRevLett.124.117204

Electronic Griffiths phase in disordered Mott-transition system.
Riku Yamamoto, Tetsuya Furukawa, Kazuya Miyagawa, Takahiko Sasaki, Kazushi Kanoda and Tetsuaki Itou.
Phys. Rev. Lett. 124, 046404-1-6 (2020). [Editors' Suggestion]
DOI: 10.1103/PhysRevLett.124.046404

X-ray fluorescence holography for soft matter
Artoni Kevin R. Ang , Ayana Sato-Tomita, Naoya Shibayama, Yasufumi Umena, Naohisa Happo, Riho Marumi, Koji Kimura, Tomohiro Matsushita, Kazuto Akagi, Takahiko Sasaki, Yuji C. Sasaki, and Kouichi Hayashi
Jpn. J. Appl. Phys. 59, 010505-1-12 (2020).
DOI:10.7567/1347-4065/ab5d55

2019 papers


Lattice dynamics coupled to charge and spin degrees of freedom in the molecular dimer-Mott insulator k-(BEDT-TTF)2Cu[N(CN)2]Cl.
M. Matsuura, T. Sasaki, S. Iguchi, E. Gati, J. Muller, O. Stockert, A. Piovano, M. Bohm, J. T. Park, S. Biswas, S. M. Winter, R. Valenti, A. Nakao and M. Lang
Phys. Rev. Lett. 123, 027601-1-6 (2019).
DOI:10.1103/PhysRevLett.123.027601
[Erratum] Phys. Rev. Lett. 125, 239901-1-2 (2020).
DOI: 10.1103/PhysRevLett.125.239901

Critical Temperature in Bulk Ultrafine-Grained Superconductors of Nb, V, and Ta Processed by High-Pressure Torsion
Terukazu Nishizaki, Kaveh Edalati, Seungwon Lee, Zenji Horita, Tadahiro Akune, Tsutomu Nojima, Satoshi Iguchi, Takahiko Sasaki.
Materials Transactions 60, 1367-1376 (2019).
DOI:10.2320/matertrans.MF201940

Disorder unveils Mott quantum criticality behind a first-order transition in the quasi-two-dimensional organic conductor k-(ET)2Cu[N(CN)2]Cl.
Mizuki Urai, Tetsuya Furukawa, Yasuhide Seki, Kazuya Miyagawa, Takahiko Sasaki, Hiromi Taniguchi and Kazushi Kanoda.
Phys. Rev. B 99, 245139-1-6 (2019).
DOI: 10.1103/PhysRevB.99.245139

Structural Alternation Correlated to the Conductivity Enhancement of PEDOT:PSS Films by Secondary Doping.
Keisuke Itoh, Yoshihisa Kato, Yuta Honma, Hiroyasu Masunaga, Akihiko Fujiwara, Satoshi Iguchi and Takahiko Sasaki.
J. Phys. Chem. C 123, 13467−13471 (2019).
DOI: 10.1021/acs.jpcc.9b02475

Low-Temperature Magnetism of Gold Nano Particles Contained in Electrochemical Sugar Recognition System.
T. Goto, Y. Kitamoto, K. Matsui, H. Kuroe, A. Endo, T. Hashimoto, T. Hayashita, S. Iguchi and T. Sasaki.
IEEE Transactions on Magnetics 55, 2300404-1-4 (2019).
DOI: 10.1109/TMAG.2018.2872134

π電子とプロトンの連動による新しい量子液体状態
下澤雅明,上田顕,橋本顕一郎,中惇
固体物理 54, 43-54 (2019).

赤外放射光の特徴と利用研究
池本夕佳,佐々木孝彦,檜垣勇次
ぶんせき 2019, vol. 3, 97-102 (2019).

2018 papers

Nonlinear charge oscillation driven by a single-cycle light field in an organic superconductor
Y. Kawakami, T. Amano, Y. Yoneyama, Y. Akamine, H. Itoh, G. Kawaguchi, H. M. Yamamoto, H. Kishida, K. Itoh, T. Sasaki, S. Ishihara, Y. Tanaka, K. Yonemitsu and S. Iwai.
Nature photonics 12, 474-478 (2018).
DOI: 10.1038/s41566-018-0194-4

Thermal Conductivity due to Spins in the Frustrated Two-Leg Spin Ladder System BiCu2PO6
T. Kawamata, H. Nagasawa, K. Naruse, M. Ohno, Y. Matsuoka, Y. Hagiya, M. Fujita, T. Sasaki and Y. Koike.
J. Phys. Soc. Jpn. 87, 074702-1-5 (2018).
DOI: 10.7566/JPSJ.87.074702

Effects of Disorder on the Pressure-Induced Mott Transition in k-(BEDT-TTF)2Cu[N(CN)2]Cl.
Elena Gati, Ulrich Tutsch, Ammar Naji, Markus Garst, Sebastian Kohler, Harald Schubert, Takahiko Sasaki and Michael Lang.
Crystals 8, 38-1-20 (2018).
DOI: 10.3390/cryst8010038

Mesoscopic 2D Charge Transport in Commonplace PEDOT:PSS Films.
Y. Honma, K. Itoh, H. Masunaga, A. Fujiwara, T. Nishizaki, S. Iguchi, T. Sasaki.
Adv. Electron. Mater. 4, 1700490-1-6 (2018).
DOI: 10.1002/aelm.201700490

Pseudogap Behavior of the Nuclear Spin-Lattice Relaxation Rate in FeSe Probed by 77Se-NMR.
Anlu Shi, T. Arai, S. Kitagawa, T. Yamanaka, K. Ishida, Anna E. B"ohmer, C. Meingast, T. Wolf, M. Hirata, and T. Sasaki.
J. Phys. Soc. Jpn. 87, 013704-1-4 (2018).
DOI: 10.7566/JPSJ.87.013704

固体中の強相関電子の結晶化とガラス化-幾何学的フラストレーションによる秩序と無秩序-
橋本顕一郎,佐々木孝彦
固体物理 53, 745-758 (2018).

2017 papers

Quantum-disordered state of magnetic and electric dipoles in an organic Mott system
M. Shimozawa, K. Hashimoto, A. Ueda, Y. Suzuki, K. Sugii, S. Yamada, Y. Imai, R. Kobayashi, K. Itoh, S. Iguchi, M. Naka, S. Ishihara, H. Mori, T. Sasaki and M. Yamashita.
Nature Communications 8, 1821-1-6 (2017).
DOI:
10.1038/s41467-017-01849-x

Gapless magnetic excitations in the kagome antiferromagnet Ca-kapellasite probed by 35^Cl NMR spectroscopy
Y. Ihara, T. Sasaki, N. Noguchi, Y. Ishii, M. Oda, and H. Yoshida.
Phys. Rev. B 96, 180409(R)-1-5 (2017).
DOI: 10.1103/PhysRevB.96.180409

Crystallization and vitrification of electrons in a glass-forming charge liquid
S. Sasaki, K. Hashimoto, R. Kobayashi, K. Itoh, S. Iguchi, Y. Nishio, Y. Ikemoto, T. Moriwaki, N. Yoneyama, M. Watanabe, A. Ueda, H. Mori, K. Kobayashi, R. Kumai, Y. Murakami, J. Müller, and T. Sasaki
Science 357, 1381-1385 (2017).
DOI :10.1126/science.aal3120

Dimer-Mott and charge-ordered insulating states in the quasi-one-dimensional organic conductors delta'_P and delta'_C-(BPDT-TTF)2ICl2
R. Kobayashi, K. Hashimoto, N. Yoneyama, K. Yoshimi, Y. Motoyama, S. Iguchi, Y. Ikemoto, T. Moriwaki, H. Taniguchi, and T. Sasaki.
Phys. Rev. B 96, 115112-1-8 (2017).
DOI: 10.1103/PhysRevB.96.115112

First-principles investigation of local structure deformation induced by x-ray irradiation in k-(BEDT-TTF)2Cu[N(CN)2]Br.
L. Kang, K. Akagi, K. Hayashi and T. Sasaki.
Phys. Rev. B 95, 214106-1-7 (2017).
DOI: 10.1103/PhysRevB.95.214106

Fine-tuning the Mott metal-insulator transition and critical charge carrier dynamics in molecular conductors.
J. Muller, B. Hartmann and T. Sasaki
Philosophical Magazine 97, 3477-3494 (2017).
DOI: 10.1080/14786435.2017.1296200

Polarization selectivity of charge localization induced by a 7-fs nearly single-cycle light field in an organic metal.
Y. Kawakami, Y. Yoneyama, T. Amano, H. Itoh, K. Yamamoto, Y. Nakamura, H. Kishida, T. Sasaki, S. Ishihara, Y. Tanaka, K. Yonemitsu, and S. Iwai
Phys. Rev. B 95, 201105(R)-1-5 (2017).
DOI: 10.1103/PhysRevB.95.201105

Electric-field-induced intradimer charge disproportionation in the dimer-Mott insulator b'-(BEDT-TTF)2ICl2.
Y. Hattori, S. Iguchi,T. Sasaki, S. Iwai, H. Taniguchi and H. Kishida.
Phys. Rev. B 95, 085149-1-5 (2017).
DOI: 10.1103/PhysRevB.95.085149

Magneto-thermopower in the Weak Ferromagnetic Oxide CaRu0.8Sc0.2O3: An Experimental Test for the Kelvin Formula in a Magnetic Material.
T. D. Yamamoto, H. Taniguchi, Y. Yasui, S. Iguchi, T. Sasaki, I. Terasaki
J. Phys. Soc. Jpn. 86, 104707-1-4 (2017).
DOI: 10.7566/JPSJ.86.104707

Undoped high-T-c superconductivity in T'-La1.8Eu0.2CuO4+d revealed by 63,65Cu and 139La-139 NMR: Bulk superconductivity and antiferromagnetic fluctuations.
H. Fukazawa, S. Ishiyama, M. Goto, S. Kanamaru, K. Ohashi, T. Kawamata, T. Adachi, M. Hirata, T. Sasaki, Y. Koike, Y. Kohori
Physica C 541, 30-35 (2017).
DOI: 10.1016/j.physc.2017.08.002

Spin dynamics in the high-field phases of volborthite.
M. Yoshida, K. Nawa, H. Ishikawa, M. Takigawa, M. Jeong, S. Kramer, M. Horvatic, C. Berthier, K. Matsui, T. Goto, S. Kimura, T. Sasaki, J. Yamaura, H. Yoshida, Y. Okamoto, and Z. Hiroi
Phys. Rev. B 96, 180413(R)-1-5 (2017).
DOI: 10.1103/PhysRevB.96.180413

Rb-NMR study of the quasi-one dimensional competing spin-chain compound Rb2Cu2Mo3O12.
K. Matsui, A. Yagi, Y. Hoshino, S. Atarashi, M. Hase, T. Sasaki and T. Goto
Phys. Rev. B 96, 220402(R)-1-5 (2017).
DOI: 10.1103/PhysRevB.96.220402

超伝導と超電導
佐々木孝彦
固体物理52, 219-225 (2017).

2016 papers

Role of anion ordering and effective pressure in the field-induced spin-density-wave phase of (TMTSF)2X.
T. Minamidate, N. Matsunaga, K. Nomura and T. Sasaki.
Europhysics Letters 115, 37002-1-6 (2016).
DOI: 10.1209/0295-5075/115/37002

Breakdown of Hooke’s law of elasticity at the Mott critical endpoint in an organic conductor.
E. Gati, M. Garst, R. S. Manna, U. Tutsch, B. Wolf, L. Bartosch, H. Schubert, T. Sasaki, J. A. Schlueter, M. Lang.
Science Advances 2, e1601646-1-7 (2016).
DOI: 10.1126/sciadv.1601646

Ultrafast response of plasmalike reflectivity edge in (TMTTF)2AsF6 driven by a 7-fs 1.5-cycle strong-light field.
Y. Naitoh, Y. Kawakami, T. Ishikawa, Y. Sagae, H. Itoh, K. Yamamoto, T. Sasaki, M. Dressel, S. Ishihara, Y. Tanaka, K. Yonemitsu and S. Iwai.
Phys. Rev. B 93, 165126-1-5 (2016).
DOI: 10.1103/PhysRevB.93.165126

Static and dynamic interaction between pi and d electrons in organic superconductor b''-(BEDT-TTF)4[(H3O)Fe(C2O4)3]C6H5Br studied by 13C NMR spectroscopy.
Y. Ihara, Y. Futami, A. Kawamoto, K. Matsui, T. Goto, T. Sasaki, S. Benmansour and C. J. Gomez-Garcia.
Phys. Rev. B 94, 064504-1-6 (2016).
DOI: 10.1103/PhysRevB.94.064504

item Thermodynamic properties of superconducting and non-superconducting Pr2Ba4Cu7O15-d compounds with metallic double chains.
T. Konno, M. Matsukawa, K. Sugawara, H. Taniguchi, J. Echigoya, A. Matsushita,M. Hagiwara, K. Sano, Y. Ohno, Y. Yamada, T. Sasaki, Y. Hayasaka.
Physica C, 521, 13-17 (2016).
DOI: 10.1016/j.physc.2015.12.004

Thermal Conductivity and Spin State of the Spin Diamond-Chain System Azurite Cu3(CO3)2(OH)2.
Y. Hagiya, T. Kawamata, K. Naruse, M. Ohno, Y. Matsuoka, H. Sudo, H. Nagasawa, H. Kikuchi, T. Sasaki and Y. Koike
J. Phys. Soc. Jpn. 85, 034715-1-4 (2016).
DOI: 10.7566/JPSJ.85.034715

Effect of Pressure on Magneto-Transport Properties in the Superconducting and Normal Phases of the Metallic Double Chain Compound Pr2Ba4Cu7O15.
Masayoshi Kuwabara, Michiaki Matsukawa, Keisuke Sugawara, Haruka Taniguchi, Akiyuki Matsushita, Makoto Hagiwara, Kazuhiro Sano, Yoshiaki Ono, Takahiko Sasaki
J. Phys. Soc. Jpn. 85, 124704-1-6 (2016).
DOI: 10.7566/JPSJ.85.124704

2015 papers


Emergence of charge degrees of freedom under high pressure in the organic dimer-Mott insulator b''-(BEDT-TTF)2ICl2.
K. Hashimoto, R. Kobayashi, H. Okamura, H. Taniguchi, Y. Ikemoto, T. Moriwaki, S. Iguchi, M. Naka, S. Ishihara and T. Sasaki
Phys. Rev. B 92, 085149-1-7 (2015).
DOI: 10.1103/PhysRevB.92.085149

Quantum Spin Liquid Emerging from Antiferromagnetic Order by Introducing Disorder
T. Furukawa, K. Miyagawa, T. Itou, M. Ito, H. Taniguchi, M. Saito, S. Iguchi, T. Sasaki and K. Kanoda
Phys. Rev. Lett. 115, 077001-1-5 (2015)
DOI: 10.1103/PhysRevLett.115.077001

Uniaxial Chemical Pressure and Disorder Effects on Magnetic and Dielectric Properties of b'-(BEDT-TTF)2(ICl2)1-x(AuCl2)x.
Naoki Yoneyama, Takahide Kurobe, Satoshi Iguchi, Akira Miura, Takahiro Takei, Nobuhiro Kumada, and Takahiko Sasaki
J. Phys. Soc. Jpn. 84, 033709-1-4 (2015).
DOI: 10.7566/JPSJ.84.033709

Possible quantum Hall effect in a magnetic-field-induced phase transition in the quasi-one-dimensional CDW organic conductor, HMTSF-TCNQ.
K. Murata, Y. Fukumoto, K. Yokogawa, W. Kang, R. Takaoka, R. Tada, H. Hirayama, J. S. Brooks, D. Graf, H. Yoshino, T. Sasaki, R. Kato
Physica B 460, 241-244 (2015).
DOI: 10.1016/j.physb.2014.11.080

Critical Slowing Down of the Charge Carrier Dynamics at the Mott Metal-Insulator Transition
Benedikt Hartmann, David Zielke, Jana Polzin, Takahiko Sasaki. and Jens Mueller
Phys. Rev. Lett. 114, 216403-1-5 (2015).
DOI: 10.1103/PhysRevLett.114.216403

X-ray Irradiation Effect on the Dielectric Charge Response in the Dimer-Mott Insulator k-(BEDT-TTF)2Cu2(CN)3.
S. Sasaki, S. Iguchi, N. Yoneyama and T. Sasaki J. Phys. Soc. Jpn. 84, 074709-1-5 (2015).
DOI: 10.7566/JPSJ.84.074709

分子性ダイマーモット絶縁体の特異な誘電・光応答と電子誘電性
岩井伸一郎,石原純夫,佐々木孝彦
固体物理 50, 59-74 (2015).

導電性高分子PEDOT/PSSの電気伝導性向上を目指した階層構造制御
本間優太,佐々木孝彦,増永啓康,藤原明比古
工業材料 63,No.4, 23-28 (2015).

分子性物質の物理-物性物理の新潮流-
(ISBN978-4-253-13119-2)
第2章 電子相関と金属‐絶縁体転移 p.21-50 (佐々木孝彦)
(株)朝倉書店 (2015)

Institutes in Asia Pacific "Institute for Materials Research, Tohoku University".
T. Sasaki and K. Takanashi
AAPPS bulletin 25, 33- 39 (2015).

2014 papers


Collective excitation of a short-range charge ordering in q-(BEDT-TTF)2CsZn(SCN)4.
K. Hashimoto, S. C. Zhan, R. Kobayashi, S. Iguchi, N. Yoneyama, T. Moriwaki, Y. Ikemoto and T. Sasaki
Phys. Rev. B 89, 085107-1-5 (2014).
DOI: 10.1103/PhysRevB.89.085107

Orientation of Conductive Polymer PEDOT:PSS Films Prepared Under Magnetic Field.
Milena A. Guziak, Yuta Honma, Kenichiro Hashimoto, Terukazu Nishizaki, Kazuo Watanabe, Takahiko Sasaki
JPS Conf. Proc. 1, 012051-1-4 (2014).
DOI: 10.7566/JPSCP.1.012051

Magnetic-field-induced phase transitions in the quasi-one-dimensional organic conductor HMTSF-TCNQ
K. Murata, Y. Fukumoto, K. Yokogawa, R. Takaoka, W. Kang, J. S. Brooks, D. Graf, H. Yoshino, T. Sasaki, and R. Kato
Low Temperature Physics 40, 371-376 (2014).
DOI: 10.1063/1.4869591

Magnetic Raman Scattering Study of Spin Frustrated Systems, k-(BEDT-TTF)2X.
Yuto Nakamura, Naoki Yoneyama, Takahiko Sasaki, Takami Tohyama, Arao Nakamura, and Hideo Kishida
J. Phys. Soc. Jpn. 83, 074708-1-5 (2014).
DOI: 10.7566/JPSJ.83.074708

Optical Study of a Novel Phase Transition from Dimer-Mott to Charge-Order Insulator.
Ryuji Okazaki, Yukio Yasui, Ichiro Terasaki, Yuka Ikemoto, Taro Moriwaki, Takahisa Shikama, Kazuyuki Takahashi, Hatsumi Mori, Hideki Nakaya, and Takahiko Sasaki
JPS conf. Proc. 3, 013010-1-6 (2014).
DOI: 10.7566/JPSCP.3.013010

Optical response of a glassy electronic state in q-(BEDT-TTF)CsZn(SCN)4.
Kenichiro Hashimoto, Shicheng C. Zhan, Ryota Kobayashi, Satoshi Iguchi, Naoki Yoneyama, Taro Moriwaki, Yuka Ikemoto and Takahiko Sasaki
JPS conf. Proc. 3, 013018-1-6 (2014).
DOI: 10.7566/JPSCP.3.013018

Dielectric Response of Multiorbital Molecular Compounds (TTM-TTP)X (X = AuI2 and I3).
Satoru Sasaki, Satoshi Iguchi, Tadashi Kawamoto, Takehiko Mori, and Takahiko Sasaki
J. Phys. Soc. Jpn. 83, 094709-1-5 (2014).
DOI: 10.7566/JPSJ.83.094709

Mott metal-insulator transition induced by utilizing a glasslike structural ordering in low-dimensional molecular conductors.
B. Hartmann, J. Mueller and T. Sasaki
Phys. Rev. B 90, 195150-1-6 (2014).
DOI: 10.1103/PhysRevB.90.195150

Optical freezing of charge motion in an organic conductor.
T. Ishikawa, Y. Sagae, Y. Naitoh, Y. Kawakami, H. Itoh, K. Yamamoto, K. Yakushi, H. Kishida, T. Sasaki, S. Ishihara, Y. Tanaka, K. Yonemitsu and S. Iwai
Nature Communications 5, 5528-1-6 (2014).
DOI:10.1038/ncomms6528

Interface-dependent magnetotransport properties for thin Pt films on ferrimagnetic Y3Fe5O12.
Y. Shiomi, T. Ohtani, S. Iguchi, T. Sasaki, Z. Qiu, H. Nakayama, K. Uchida and E. Saitoh.
Appl. Phys. Lett. 104, 242406-1-5 (2014).
DOI: 10.1063/1.4883898

60年前の「世界の頭脳」の仙台訪問-1枚の記念写真から-
佐々木孝彦
固体物理 49, 499-503 (2014).

2013 papers

Collective excitation of electric dipole on molecular dimer in organic dimer-Mott insulator.
K. Itoh, H. Itoh, M. Naka, S. Saito, I. Hosako, N. Yoneyama, S. Ishihara, T. Sasaki and S. Iwai.
Phys. Rev. Lett. 110, 106401-1-5 (2013).
DOI: 10.1103/PhysRevLett.110.106401

Relaxor ferroelectricity induced by electron correlations in a molecular dimer Mott insulator.
S. Iguchi, S. Sasaki, N. Yoneyama, H. Taniguchi, T. Nishizaki, and T. Sasaki.
Phys. Rev. B 87, 075107-1-5 (2013).
DOI: 10.1103/PhysRevB.87.075107

Narrowing of phonon spectrum induced by ultrafast charge fluctuations in an organic dimer Mott insulator.
K. Itoh, H. Itoh, S. Saito, I. Hosako, Y. Nakamura, H. Kishida, N. Yoneyama, T. Sasaki, S. Ishihara, and S. Iwai.
Phys. Rev. B 88, 125101-1-6 (2013).
DOI: 10.1103/PhysRevB.88.125101

Electrical conductivity of PEDOT:PSS film prepared through organic compound addition.
M. A. Guziak, T. Nishizaki, Y. Honma, K. Watanabe and T. Sasaki.
Trans. Mat. Res. Soc. Japan 38, 363-367 (2013).

Optical Conductivity Measurement of a Dimer Mott-Insulator to Charge-Order Phase Transition in a Two-Dimensional Quarter-Filled Organic Salt Compound.
R. Okazaki, Y. Ikemoto, T. Moriwaki, T. Shikama, K. Takahashi, H. Mori, H. Nakaya, T. Sasaki, Y. Yasui, and I. Terasaki.
Phys. Rev. Lett. 111, 217801-1-5 (2013).
DOI: 10.1103/PhysRevLett.111.217801

2012 papers


Influence of randomness on the Mott transition in k-(BEDT-TTF)2X.
T. Sasaki, K. Sano, H. Sugawara, N. Yoneyama and N. Kobayashi.
Phys. Status Solidi B 249, 947-952 (2012).
DOI:10.1002/pssb.201100614

Field-induced CDW in HMTSF-TCNQ.
K. Murata, W. Kang, K. Masuda, T. Kuse, T. Sasaki, K. Yokogawa, H. Yoshino, J. S. Brooks, E. S. Choi, A. Kiswandhi, R. Kato.
Physica B 407, 1927-1929 (2012).
DOI:10.1016/j.physb.2012.01.066

PEDOT Nanocrystal in Highly Conductive PEDOT:PSS Polymer Films.
T. Takano, H. Masunaga, A. Fujiwara, H. Okuzaki and T. Sasaki.
Macromolecules 45, 3859-3865 (2012).
DOI:10.1021/ma300120g

Mott-Anderson Transition in Molecular Conductors: Influence of Randomness on Strongly Correlated Electrons in the k-(BEDT-TTF)2X System.
T. Sasaki.
Crystals 2, 374-392 (2012). DOI:10.3390/cryst2020374

Spin and Charge Transport in the X-ray Irradiated Quasi-2D Layered Compound: k-(BEDT-TTF)2Cu[N(CN)2]Cl.
A. Antal, T. Feh'er, N. Yoneyama, L. Forr'o, T. Sasaki and A. J'anossy.
Crystals {\bf 2}, 579-589 (2012). DOI:10.3390/cryst2020579

Microscopic Phase Separation in Triangular-Lattice Quantum Spin Magnet k-(BEDT-TTF)2Cu2(CN)3 Probed by Muon Spin Relaxation.
S. Nakajima, T. Suzuki, Y. Ishii, K. Ohishi, I. Watanabe, T. Goto, A Oosawa, N. Yoneyama, N. Kobayashi, F. L. Pratt, and T. Sasaki.
J. Phys. Soc. Jpn. 81, 063706-1-4 (2012).
DOI:10.1143/JPSJ.81.063706

強相関電子系分子性導体のモット-アンダーソン転移
佐々木孝彦}
日本物理学会誌 67, 504-508 (2012).

2011 papers

Suppression of Superconductivity by Nonmagnetic Disorder in Organic Superconductor k-(BEDT-TTF)2Cu(NCS)2
T. Sasaki, H. Oizumi, Y. Honda, N. Yoneyama and N. Kobayashi
J. Phys. Soc. Jpn. 80, 104703-1-10 (2011).

Diffusive charge transport with strongly renormalized carrier mass in hole-doped Mott insulators (Y1−xCdx)2Mo2O7 with frustrated pyrochlore lattice.
S. Iguchi, Y. Kumano, K. Ueda, S. Kumakura and Y. Tokura.
Phys. Rev. B 84, 174416-1-5 (2011).

Two pseudogaps with different energy scales at the antinode of the high-temperature Bi2Sr2CuO6 superconductor using angle-resolved photoemission spectroscopy
K. Nakayama, T. Sato, Y.-M. Xu, Z.-H. Pan, P. Richard, H. Ding, H.-H. Wen, K. Kudo, T. Sasaki, N. Kobayashi and T. Takahashi
Phys. Rev. B 83, 224509-1-4 (2011).

2010 papers

Suppression of superconductivity by X-ray irradiation induced disorders in organic superconductor k-(BEDT-TTF)2Cu[N(CN)2]Br.
K. Sano, T. Sasaki, N. Yoneyama, N. Kobayashi.
Physica B 405, S279-S281 (2010).

X-ray irradiation effect on magnetic properties of dimer-Mott insulators: k-(BEDT-TTF)2Cu[N(CN)2]Cl and b'-(BEDT-TTF)2ICl2
N. Yoneyama, T. Sasaki, N. Kobayashi, K. Furukawa and T. Nakamura.
Physica B 405, S244-S246 (2010).

Electron localization near the Mott transition in the organic superconductor k-(BEDT-TTF)2Cu[N(CN)2]Br.
K. Sano, T. Sasaki, N. Yoneyama, N. Kobayashi.
Phys. Rev. Lett. 104, 217003-1-4 (2010).

Magnetic properties of X-ray irradiated organic Mott insulator k-(BEDT-TTF)Cu[N(CN)2]Cl.
N. Yoneyama, K. Furukawa, T. Nakamura, T. Sasaki, and N. Kobayashi
J. Phys. Soc. Jpn. 79, 063706-1-4 (2010).

Anomalous dielectric response in the dimer Mott insulator k-(BEDT-TTF)2Cu(CN)3
M. Abdel-Jawad, I. Terasaki, T. Sasaki, N. Yoneyama, N. Kobayashi, Y. Uesu and C. Hotta.
Phys. Rev. B 82, 125119-1-5 (2010).

Early-stage dynamics of light-matter interaction leading to the insulator-to-metal transition in a charge ordered orgnaic crystal.
Y. Kawakami, T. Fukatsu, Y. Sakurai, H. Unno, H. Itoh, S. Iwai, T. Sasaki, K. Yamamoto, K. Yakushi and K. Yonemitsu.
Phys. Rev. Lett. 105, 246402-1-4 (2010).