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Your search keyword '"Matsuda, Yuji"' showing total 24 results
Start Over Author "Matsuda, Yuji" Journal journal of the physical society of japan
24 results on '"Matsuda, Yuji"'

2. Evidence for a Phase Transition in the Quantum Spin Liquid State of a Kitaev Candidate α-RuCl3.

Author

Suetsugu, Shota, Ukai, Yuzuki, Shimomura, Masaki, Kamimura, Masashi, Asaba, Tomoya, Kasahara, Yuichi, Kurita, Nobuyuki, Tanaka, Hidekazu, Shibauchi, Takasada, Nasu, Joji, Motome, Yukitoshi, and Matsuda, Yuji

Abstract

The Kitaev quantum spin liquid (QSL) on the two-dimensional honeycomb lattice epitomizes an entangled topological state, where the spins fractionalize into Majorana fermions. This state has aroused tremendous interest because it harbors non-Abelian anyons. The half-integer quantized thermal Hall (HIQTH) conductance observed in α-RuCl3 is a key signature of the non-Abelian topological order. However, the fate of this topologically nontrivial state at intense fields remains largely elusive. Here, we report the thermal conductivity κ and specific heat C of α-RuCl3 with in-plane magnetic fields H. For the field direction perpendicular to the Ru–Ru bond, where the HIQTH effect is observed, we find clear anomalies in κ(H) and C(H) at μ0H* ≈ 11 T, indicating the emergence of a phase transition between low- and high-field spin liquid phases. We point out that this phase transition is likely to be weak first-order. We also find that even well above H*, κ(H) is highly anisotropic with respect to H-direction. This indicates that the high field phase is not in a simple spin-polarized state and spin-fractionalization may be retained. Intriguingly, the thermal Hall conductance of the same crystal deviates from the half-integer plateau near H*, suggesting that the topological properties are affected by this transition. [ABSTRACT FROM AUTHOR]

Published
2022
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5. ⁷⁷Se-NMR study under pressure on 12%-S doped FeSe

Author

Kuwayama, Takanori, Matsuura, Kohei, Mizukami, Yuta, Kasahara, Shigeru, Matsuda, Yuji, Shibauchi, Takasada, Uwatoko, Yoshiya, and Fujiwara, Naoki

Subjects
Condensed Matter::Strongly Correlated Electrons
Abstract

The 12%-S doped FeSe system has a high Tc of 30 K at a pressure of 3.0 GPa. We have successfully investigated its microscopic properties for the first time via 77Se-NMR measurements under pressure. The antiferromagnetic (AFM) fluctuations at the optimal pressure (∼3 GPa) exhibited unexpected suppression compared with the AFM fluctuations at ambient pressure, even though the optimal pressure is close to the phase boundary of the AFM phase induced at the high-pressure region. In addition, we revealed that the SC phase at an applied field of 6.02 T exhibited a remarkable double-dome structure in the pressure–temperature phase diagram, unlike the SC phase at zero field.

Published
2019

6. 77Se-NMR Study under Pressure on 12%-S Doped FeSe

Author

Kuwayama, Takanori, primary, Matsuura, Kohei, additional, Mizukami, Yuta, additional, Kasahara, Shigeru, additional, Matsuda, Yuji, additional, Shibauchi, Takasada, additional, Uwatoko, Yoshiya, additional, and Fujiwara, Naoki, additional

Published
2019
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8. Discovery of Emergent Photon and Monopoles in a Quantum Spin Liquid

Author

Tokiwa, Yoshifumi, primary, Yamashita, Takuya, additional, Terazawa, Daiki, additional, Kimura, Kenta, additional, Kasahara, Yuichi, additional, Onishi, Takafumi, additional, Kato, Yasuyuki, additional, Halim, Mario, additional, Gegenwart, Philipp, additional, Shibauchi, Takasada, additional, Nakatsuji, Satoru, additional, Moon, Eun-Gook, additional, and Matsuda, Yuji, additional

Published
2018
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11. Quasiparticle Excitations in the Superconducting State of FeSe Probed by Thermal Hall Conductivity in the Vicinity of the BCS–BEC Crossover

Author

Watashige, Tatsuya, primary, Arsenijević, Stevan, additional, Yamashita, Takuya, additional, Terazawa, Daiki, additional, Onishi, Takafumi, additional, Opherden, Lars, additional, Kasahara, Shigeru, additional, Tokiwa, Yoshifumi, additional, Kasahara, Yuichi, additional, Shibauchi, Takasada, additional, von Löhneysen, Hilbert, additional, Wosnitza, Jochen, additional, and Matsuda, Yuji, additional

Published
2017
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13. Pressure-Induced Antiferromagnetic Transition and Phase Diagram in FeSe

Author

Terashima, Taichi, primary, Kikugawa, Naoki, additional, Kasahara, Shigeru, additional, Watashige, Tatsuya, additional, Shibauchi, Takasada, additional, Matsuda, Yuji, additional, Wolf, Thomas, additional, Böhmer, Anna E., additional, Hardy, Frédéric, additional, Meingast, Christoph, additional, Löhneysen, Hilbert v., additional, and Uji, Shinya, additional

Published
2015
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17. Chemical Pressure and Physical Pressure in BaFe2(As1-xPx)2

Author

E. Klintberg, Lina, primary, K. Goh, Swee, additional, Kasahara, Shigeru, additional, Nakai, Yusuke, additional, Ishida, Kenji, additional, Sutherland, Michael, additional, Shibauchi, Takasada, additional, Matsuda, Yuji, additional, and Terashima, Takahito, additional

Published
2010
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19. Anomalous Flux Line Lattice in CeCoIn5

Author

Ohira-Kawamura, Seiko, primary, Shishido, Hiroaki, additional, Kawano-Furukawa, Hazuki, additional, Lake, Bella, additional, Wiedenmann, Albrecht, additional, Kiefer, Klaus, additional, Shibauchi, Takasada, additional, and Matsuda, Yuji, additional

Published
2008
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21. Microscopic Evidence of Direct Coupling between Magnetic and Superconducting Order Parameters in BaFe2(As1-xPx)2

Author

Iye, Tetsuya, Nakai, Yusuke, Kitagawa, Shunsaku, Ishida, Kenji, Kasahara, Shigeru, Shibauchi, Takasada, Matsuda, Yuji, and Terashima, Takahito

Abstract

The coexistence of magnetism and superconductivity in the isovalent-P-substituted BaFe2(As1-xPx)2has been investigated microscopically by 31P-NMR measurements. We found that superconducting (SC) transition occurs in a magnetic region with static ordered moments and that the moments are reduced below the SC transition temperature $T_{\text{c}}$ in the samples near the phase boundary of magnetism and superconductivity. Our results indicate that magnetism and superconductivity coexist spatially but compete with each other on the same Fermi surfaces. The coexistence state is qualitatively different from that observed in other unconventional superconductors and gives a strict constraint on the theoretical model for superconductivity in BaFe2(As1-xPx)2.

Published
2012
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24. Chemical Pressure and Physical Pressure in BaFe2(As1-xPx)2

Author

Klintberg, Lina E., Goh, Swee K., Kasahara, Shigeru, Nakai, Yusuke, Ishida, Kenji, Sutherland, Michael, Shibauchi, Takasada, Matsuda, Yuji, and Terashima, Takahito

Abstract

Measurements of the superconducting transition temperature, $T_{\text{c}}$, under hydrostatic pressure via bulk AC susceptibility were carried out on several concentrations of phosphorous substitution in BaFe2(As1-xPx)2. The pressure dependence of unsubstituted BaFe2As2, phosphorous concentration dependence of BaFe2(As1-xPx)2, as well as the pressure dependence of BaFe2(As1-xPx)2all point towards an identical maximum $T_{\text{c}}$ of 31 K. This demonstrates that phosphorous substitution and physical pressure result in similar superconducting phase diagrams, and that phosphorous substitution does not induce substantial impurity scattering.

Published
2010
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