Study of the pressure-induced second superconducting phase of (NH3)YCS0.4FeSe with double-dome superconductivity

Yoshiya Yamamoto; Hitoshi Yamaoka; Seiichiro Onari; Masahiro Yoshida; Naohisa Hirao; Saori Kawaguchi; Yasuo Oishi; Xiao Miao; Yoshihiro Kubozono; Jung Fu Lin; Nozomu Hiraoka; Hirofumi Ishii; Yen Fa Liao; Ku Ding Tsuei; Jun'ichiro Mizuki

doi:10.7566/JPSJ.88.074704

Study of the pressure-induced second superconducting phase of (NH₃)_YCS_0.4FeSe with double-dome superconductivity

Yoshiya Yamamoto, Hitoshi Yamaoka, Seiichiro Onari, Masahiro Yoshida, Naohisa Hirao, Saori Kawaguchi, Yasuo Oishi, Xiao Miao, Yoshihiro Kubozono, Jung Fu Lin, Nozomu Hiraoka, Hirofumi Ishii, Yen Fa Liao, Ku Ding Tsuei, Jun'ichiro Mizuki

Research Institute for Interdisciplinary Science

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Abstract

The pressure dependence of the crystal and electronic structures of (NH₃)_yCs_0.4FeSe, which has two pressure-induced superconducting domes of the SC1 and SC2 phases, was investigated by x-ray diffraction and emission spectroscopy at low temperatures. We found a pressure-induced change in the crystal structure from tetragonal (T) to collapsed tetragonal (cT) and peculiar pressure dependence of the magnetic moment between the SC1 and SC2 phases at a low temperature. The electronic structure also markedly changed between the two phases. The results suggest that the increase in the electron-electron correlation accompanying the increase in the magnetic moment may relate the high T_c in the SC2 phase. Theoretical calculations using the multi-orbital Hubbard model revealed that the spin susceptibility decreases in the SC1 phase and increases in the SC2 phase with the T → cT phase transition.

Original language	English
Article number	074704
Journal	journal of the physical society of japan
Volume	88
Issue number	7
DOIs	https://doi.org/10.7566/JPSJ.88.074704
Publication status	Published - 2019

ASJC Scopus subject areas

Physics and Astronomy(all)

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Yamamoto, Y., Yamaoka, H., Onari, S., Yoshida, M., Hirao, N., Kawaguchi, S., Oishi, Y., Miao, X., Kubozono, Y., Lin, J. F., Hiraoka, N., Ishii, H., Liao, Y. F., Tsuei, K. D., & Mizuki, J. (2019). Study of the pressure-induced second superconducting phase of (NH₃)_YCS_0.4FeSe with double-dome superconductivity. journal of the physical society of japan, 88(7), [074704]. https://doi.org/10.7566/JPSJ.88.074704

Yamamoto, Y, Yamaoka, H, Onari, S, Yoshida, M, Hirao, N, Kawaguchi, S, Oishi, Y, Miao, X, Kubozono, Y, Lin, JF, Hiraoka, N, Ishii, H, Liao, YF, Tsuei, KD & Mizuki, J 2019, 'Study of the pressure-induced second superconducting phase of (NH₃)_YCS_0.4FeSe with double-dome superconductivity', journal of the physical society of japan, vol. 88, no. 7, 074704. https://doi.org/10.7566/JPSJ.88.074704

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title = "Study of the pressure-induced second superconducting phase of (NH3)YCS0.4FeSe with double-dome superconductivity",

abstract = "The pressure dependence of the crystal and electronic structures of (NH3)yCs0.4FeSe, which has two pressure-induced superconducting domes of the SC1 and SC2 phases, was investigated by x-ray diffraction and emission spectroscopy at low temperatures. We found a pressure-induced change in the crystal structure from tetragonal (T) to collapsed tetragonal (cT) and peculiar pressure dependence of the magnetic moment between the SC1 and SC2 phases at a low temperature. The electronic structure also markedly changed between the two phases. The results suggest that the increase in the electron-electron correlation accompanying the increase in the magnetic moment may relate the high Tc in the SC2 phase. Theoretical calculations using the multi-orbital Hubbard model revealed that the spin susceptibility decreases in the SC1 phase and increases in the SC2 phase with the T → cT phase transition.",

author = "Yoshiya Yamamoto and Hitoshi Yamaoka and Seiichiro Onari and Masahiro Yoshida and Naohisa Hirao and Saori Kawaguchi and Yasuo Oishi and Xiao Miao and Yoshihiro Kubozono and Lin, {Jung Fu} and Nozomu Hiraoka and Hirofumi Ishii and Liao, {Yen Fa} and Tsuei, {Ku Ding} and Jun'ichiro Mizuki",

note = "Funding Information: Acknowledgments The experiments were performed at Taiwan beamlines BL12XU and BL12B2 at SPring-8 under SPring-8 Proposal Nos. 2015B4260 and 2016B4264 (corresponding to NSRRC Proposal No. 2015-3-018) and at BL10XU under SPring-8 Proposal No. 2016B1725. The work at SPring-8 was supported by Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science, KAKENHI 15K05914. We thank Riho Tanaka, Seika Shonai, and Lu Zheng for their help in the experiments. J.F.L. acknowledges support from HPSTAR. Publisher Copyright: {\textcopyright} 2019 The Physical Society of Japan",

year = "2019",

doi = "10.7566/JPSJ.88.074704",

language = "English",

volume = "88",

journal = "Journal of the Physical Society of Japan",

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publisher = "Physical Society of Japan",

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T1 - Study of the pressure-induced second superconducting phase of (NH3)YCS0.4FeSe with double-dome superconductivity

AU - Yamamoto, Yoshiya

AU - Yamaoka, Hitoshi

AU - Onari, Seiichiro

AU - Yoshida, Masahiro

AU - Hirao, Naohisa

AU - Kawaguchi, Saori

AU - Oishi, Yasuo

AU - Miao, Xiao

AU - Kubozono, Yoshihiro

AU - Lin, Jung Fu

AU - Hiraoka, Nozomu

AU - Ishii, Hirofumi

AU - Liao, Yen Fa

AU - Tsuei, Ku Ding

AU - Mizuki, Jun'ichiro

N1 - Funding Information: Acknowledgments The experiments were performed at Taiwan beamlines BL12XU and BL12B2 at SPring-8 under SPring-8 Proposal Nos. 2015B4260 and 2016B4264 (corresponding to NSRRC Proposal No. 2015-3-018) and at BL10XU under SPring-8 Proposal No. 2016B1725. The work at SPring-8 was supported by Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science, KAKENHI 15K05914. We thank Riho Tanaka, Seika Shonai, and Lu Zheng for their help in the experiments. J.F.L. acknowledges support from HPSTAR. Publisher Copyright: © 2019 The Physical Society of Japan

PY - 2019

Y1 - 2019

N2 - The pressure dependence of the crystal and electronic structures of (NH3)yCs0.4FeSe, which has two pressure-induced superconducting domes of the SC1 and SC2 phases, was investigated by x-ray diffraction and emission spectroscopy at low temperatures. We found a pressure-induced change in the crystal structure from tetragonal (T) to collapsed tetragonal (cT) and peculiar pressure dependence of the magnetic moment between the SC1 and SC2 phases at a low temperature. The electronic structure also markedly changed between the two phases. The results suggest that the increase in the electron-electron correlation accompanying the increase in the magnetic moment may relate the high Tc in the SC2 phase. Theoretical calculations using the multi-orbital Hubbard model revealed that the spin susceptibility decreases in the SC1 phase and increases in the SC2 phase with the T → cT phase transition.

AB - The pressure dependence of the crystal and electronic structures of (NH3)yCs0.4FeSe, which has two pressure-induced superconducting domes of the SC1 and SC2 phases, was investigated by x-ray diffraction and emission spectroscopy at low temperatures. We found a pressure-induced change in the crystal structure from tetragonal (T) to collapsed tetragonal (cT) and peculiar pressure dependence of the magnetic moment between the SC1 and SC2 phases at a low temperature. The electronic structure also markedly changed between the two phases. The results suggest that the increase in the electron-electron correlation accompanying the increase in the magnetic moment may relate the high Tc in the SC2 phase. Theoretical calculations using the multi-orbital Hubbard model revealed that the spin susceptibility decreases in the SC1 phase and increases in the SC2 phase with the T → cT phase transition.

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Study of the pressure-induced second superconducting phase of (NH₃)_YCS_0.4FeSe with double-dome superconductivity

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