Topological phase transition in non-centrosymmetric semiconductor Te under pressure

ORAL

Abstract

Tellurium is a semiconductor which has the chiral crystal structure without inversion symmetry. Although semiconducting electronic properties and optical properties have been studied over the years, it is attracting renewed interest in recent years due to the non-centrosymmetric crystal structure and strong spin-orbit interaction. For example, current-induced magnetization has been experimentally confirmed [1] and topological phase transition from semiconductor to Weyl semimetal was also theoretically predicted [2].
In this presentation, we report the transport properties of Te under pressure. Magnetoresistance shows Shubnikov-de Haas oscillations at low temperature. By applying the hydrostatic pressure, oscillation period changes, reflecting the pressure-induced band deformation. We discuss the possibilities of Lifshitz transition (change of Fermi surface topology originating from the characteristic band evolution) and topological phase transition under high pressure.
[1] T. Furukawa et al., Nat. Commun. 8, 954 (2017)
[2] M. Hirayama et al. Phys. Rev. Lett. 114, 206401 (2015).

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Presenters

  • Toshiya Ideue

    The University of Tokyo, the University of Tokyo, the Univ. of Tokyo, Univ. of Tokyo

Authors

  • Toshiya Ideue

    The University of Tokyo, the University of Tokyo, the Univ. of Tokyo, Univ. of Tokyo

  • Motoaki Hirayama

    Center for Emergent Matter Science, RIKEN, RIKEN Center for Emergent Matter Science, RIKEN, RIKEN Center for Emergent Mattar Science, CEMS, RIKEN

  • Hiroaki Taiko

    the University of Tokyo

  • Takanari Takahashi

    Tokyo Institute of Technology

  • Masayasu Murase

    Tokyo Institute of Technology

  • Takashi Miyake

    National Institute of Advanced Industrial Science and Technology (AIST), AIST, National Institute of Advanced Industrial Science and Technology

  • Shuichi Murakami

    Tokyo Institute of Technology, Department of Physics, Tokyo Institute of Technology, Tokyo Inst of Tech - Tokyo, Physics, Tokyo Inst of Tech, Physics, Tokyo Inst. of Tech.

  • Takao Sasagawa

    MSL, Tokyo Inst of Tech, Tokyo Institute of Tech., Tokyo Institute of Technology, Laboratory for Materials and Structures, Tokyo Inst of Tech, Tokyo Inst. of Tech., Materials and Structures Laboratory, Tokyo institute of Technology

  • Yoshihiro Iwasa

    Univ of Tokyo, Department of Applied Physics, The University of Tokyo, The University of Tokyo, University of Tokyo, The Univ. of Tokyo, the University of Tokyo, the Univ. of Tokyo, Univ. of Tokyo