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

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Article number101308
JournalAIP Advances
Volume8
Issue number10
DOIs
Publication statusPublished - Oct 1 2018
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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