Magnetic fluctuations under pressure on S-doped FeSe studied via 77Se NMR

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

doi:10.1063/1.5042570

Magnetic fluctuations under pressure on S-doped FeSe studied via ⁷⁷Se NMR

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

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1 Citation (Scopus)

Abstract

FeSe_1-xS_x has attracted much attention among iron-based superconductors because the pure sample undergoes nematic and superconducting (SC) phase transitions without magnetism. A pressure-induced antiferromagnetic (AFM) phase emerges upon applying pressure. In the pressure (P)-temperature (T) phase diagram for the 12%-S doped sample, the AFM phase is separated from the nematic phase at around 3.0 GPa, and SC transition temperature (T_c) takes a maximum (∼30 K). We measured T₁ of ⁷⁷Se for the 12%-S doped FeSe at 3.0 GPa. We found from 1/T₁T that low-energy AFM fluctuations are not so much enhanced under pressure compared with those at ambient pressure. The result suggests changes of topology and nesting of Fermi surfaces during pressurizing process.

Original language	English
Article number	101308
Journal	AIP Advances
Volume	8
Issue number	10
DOIs	https://doi.org/10.1063/1.5042570
Publication status	Published - Oct 1 2018
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.5042570

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title = "Magnetic fluctuations under pressure on S-doped FeSe studied via 77Se NMR",

abstract = "FeSe1-xSx has attracted much attention among iron-based superconductors because the pure sample undergoes nematic and superconducting (SC) phase transitions without magnetism. A pressure-induced antiferromagnetic (AFM) phase emerges upon applying pressure. In the pressure (P)-temperature (T) phase diagram for the 12%-S doped sample, the AFM phase is separated from the nematic phase at around 3.0 GPa, and SC transition temperature (Tc) takes a maximum (∼30 K). We measured T1 of 77Se for the 12%-S doped FeSe at 3.0 GPa. We found from 1/T1T that low-energy AFM fluctuations are not so much enhanced under pressure compared with those at ambient pressure. The result suggests changes of topology and nesting of Fermi surfaces during pressurizing process.",

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

note = "Funding Information: The NMR work is supported by JSPS KAKENHI Grant Number JP18H01181 and a grant from Mitsubishi Foundation. We thank H. Kontani for discussion. Publisher Copyright: {\textcopyright} 2018 Author(s).",

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doi = "10.1063/1.5042570",

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T1 - Magnetic fluctuations under pressure on S-doped FeSe studied via 77Se NMR

AU - Kuwayama, Takanori

AU - Matsuura, Kohei

AU - Mizukami, Yuta

AU - Kasahara, Shigeru

AU - Matsuda, Yuji

AU - Shibauchi, Takasada

AU - Uwatoko, Yoshiya

AU - Fujiwara, Naoki

N1 - Funding Information: The NMR work is supported by JSPS KAKENHI Grant Number JP18H01181 and a grant from Mitsubishi Foundation. We thank H. Kontani for discussion. Publisher Copyright: © 2018 Author(s).

PY - 2018/10/1

Y1 - 2018/10/1

N2 - FeSe1-xSx has attracted much attention among iron-based superconductors because the pure sample undergoes nematic and superconducting (SC) phase transitions without magnetism. A pressure-induced antiferromagnetic (AFM) phase emerges upon applying pressure. In the pressure (P)-temperature (T) phase diagram for the 12%-S doped sample, the AFM phase is separated from the nematic phase at around 3.0 GPa, and SC transition temperature (Tc) takes a maximum (∼30 K). We measured T1 of 77Se for the 12%-S doped FeSe at 3.0 GPa. We found from 1/T1T that low-energy AFM fluctuations are not so much enhanced under pressure compared with those at ambient pressure. The result suggests changes of topology and nesting of Fermi surfaces during pressurizing process.

AB - FeSe1-xSx has attracted much attention among iron-based superconductors because the pure sample undergoes nematic and superconducting (SC) phase transitions without magnetism. A pressure-induced antiferromagnetic (AFM) phase emerges upon applying pressure. In the pressure (P)-temperature (T) phase diagram for the 12%-S doped sample, the AFM phase is separated from the nematic phase at around 3.0 GPa, and SC transition temperature (Tc) takes a maximum (∼30 K). We measured T1 of 77Se for the 12%-S doped FeSe at 3.0 GPa. We found from 1/T1T that low-energy AFM fluctuations are not so much enhanced under pressure compared with those at ambient pressure. The result suggests changes of topology and nesting of Fermi surfaces during pressurizing process.

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Magnetic fluctuations under pressure on S-doped FeSe studied via ⁷⁷Se NMR

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