$^{77}$Se-NMR Study under Pressure on 12%-S Doped FeSe

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

doi:10.7566/JPSJ.88.033703

$^{77}$Se-NMR Study under Pressure on 12%-S Doped FeSe

Superconductivity 2019-02-26 v1

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

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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 $^{77}$ Se-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.

Keywords

FeSe sulfur doping NMR under pressure antiferromagnetic fluctuations superconducting phase double-dome structure high pressure

Cite

@article{arxiv.1902.09133,
  title  = {$^{77}$Se-NMR Study under Pressure on 12%-S Doped FeSe},
  author = {Takanori Kuwayama and Kohei Matsuura and Yuta Mizukami and Shigeru Kasahara and Yuji Matsuda and Takasada Shibauchi and Yoshiya Uwatoko and Naoki Fujiwara},
  journal= {arXiv preprint arXiv:1902.09133},
  year   = {2019}
}

Comments

arXiv admin note: substantial text overlap with arXiv:1807.07118

$^{77}$Se-NMR Study under Pressure on 12%-S Doped FeSe

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