Pressure-induced Lifshitz transition in FeSe$_{0.88}$S$_{0.12}$ probed via $^{77}$Se-NMR

  • T. Kuwayama Graduate School of Human and Environmental Studies, Kyoto University
  • K. Matsuura Graduate School of Frontier Sciences, University of Tokyo, 277-8581 Kashiwa, Japan.
  • Y. Mizukami Graduate School of Frontier Sciences, University of Tokyo, 277-8581 Kashiwa, Japan.
  • S. Kasahara Division of Physics and Astronomy, Graduate School of Science, Kyoto 606-8502 Kyoto, Japan.
  • Y. Matsuda Division of Physics and Astronomy, Graduate School of Science, Kyoto 606-8502 Kyoto, Japan.
  • T. Shibauchi Graduate School of Frontier Sciences, University of Tokyo, 277-8581 Kashiwa, Japan.
  • Y. Uwatoko Institute for Solid State Physics, University of Tokyo, 277-8581 Kashiwa, Japan.
  • N. Fujiwara Graduate School of Human and Environmental Studies, Kyoto University, 606-8501 Kyoto, Japan.
Keywords: NMR, Superconductor, Strongly correlated electron system, Iron superconductor

Abstract

Recently, FeSe$_{1-x}$S$_x$ systems have received much attention because of the unique pressure-temperature phase diagram. We performed $^{77}$Se-NMR measurements on a single crystal of FeSe$_{0.88}$S$_{0.12}$ to investigate its microscopic properties. The shift of $^{77}$Se spectra exhibits anomalous enhancement at $1.0~\mathrm{GPa}$, suggesting a topological change in the Fermi surfaces, so-called Lifshitz transition, occurs at $1.0~\mathrm{GPa}$. The magnetic fluctuation simultaneously changes its properties, which implies a change in the dominant nesting vector.

Edited by: A. Goñi, A. Cantarero, J. S. Reparaz

Published
2019-06-18
How to Cite
Kuwayama, T., Matsuura, K., Mizukami, Y., Kasahara, S., Matsuda, Y., Shibauchi, T., Uwatoko, Y., & Fujiwara, N. (2019). Pressure-induced Lifshitz transition in FeSe$_{0.88}$S$_{0.12}$ probed via $^{77}$Se-NMR. Papers in Physics, 11, 110003. https://doi.org/10.4279/pip.110003
Section
Articles