Radial spin texture in elemental tellurium with chiral crystal structure

ORAL

Abstract

Trigonal tellurium has a chiral crystal structure which is characterized by a lack of mirror symmetry and an inversion center, resulting in the inequivalent right- and left-handed structures. To reveal the spin textures of chiral crystals, here we investigate the spin and electronic structure in p-type semiconductor elemental tellurium by using spin- and angle-resolved photoemission spectroscopy. Our data demonstrate that the highest valence band crossing the Fermi level has a spin component parallel to the momentum of electron around the Brillouin zone corners. Significantly, we have also confirmed that the spin polarization is reversed in the crystal with the opposite chirality. The results indicate that the spin textures of the right- and left-handed chiral crystals are hedgehog-like, leading to unconventional magnetoelectric effects and nonreciprocal phenomena.

*This research was partly supported by CREST projects (Grant No. JPMJCR16F2, No. JP-MJCR14F1) from Japan Science and Technology Agency (JST) and JSPS KAKENHI (Grants-in-Aid for Scientific Research) (Grant No. JP18H03678, JP19H00651).

–

Presenters

  • Masato Sakano

    • Univ of Tokyo

Authors

  • Masato Sakano

    • Univ of Tokyo

  • Motoaki Hirayama

    • RIKEN
    • RIKEN Center for Emergent Matter Science

  • Takanari Takahashi

    • Tokyo Institute of Technology

  • Shuntaro Akebi

    • Univ of Tokyo

  • Mitsuhiro Nakayama

    • Univ of Tokyo

  • Kenta Kuroda

    • Univ of Tokyo
    • University of Tokyo
    • Institute for Solid State Physics, University of Tokyo

  • Kazuaki Taguchi

    • Hiroshima University

  • Tomoki Yoshikawa

    • Hiroshima University

  • Koji Miyamoto

    • Hiroshima University

  • Taichi Okuda

    • Hiroshima University

  • Kanta Ono

    • High Energy Accelerator Research Organization

  • Hiroshi Kumigashira

    • Tohoku University
    • Institute of Multidisciplinary Research for Advanced Materials, Tohoku Univ

  • Toshiya Ideue

    • Univ of Tokyo
    • The Univ. of Tokyo, Tokyo, Japan.
    • The University of Tokyo

  • Yoshihiro Iwasa

    • Department of Applied Physics, The University of Tokyo
    • Univ of Tokyo
    • Department of Applied Physics and Quantum-Phase Electronics (QPEC) Center, The University of Tokyo
    • The Univ. of Tokyo, Tokyo, Japan.
    • The University of Tokyo
    • Applied Physics, the University of Tokyo

  • Mitsuishi Natsuki

    • Univ of Tokyo

  • Kyoko Ishizaka

    • Univ of Tokyo
    • Department of Applied Physics, University of Tokyo

  • Shik Shin

    • Univ of Tokyo
    • University of Tokyo
    • Institute for Solid State Physics, University of Tokyo
    • Univ of Tokyo-Kashiwanoha
    • Institute for Solid State Physics, The University of Tokyo

  • Takashi Miyake

    • National Institute of Advanced Industrial Science and Technology
    • AIST

  • Shuichi Murakami

    • Department of physics, Tokyo Inst of Tech - Tokyo
    • Tokyo Institute of Technology
    • Tokyo Inst of Tech - Tokyo
    • Department of Physics, Tokyo Institute of Technology

  • Takao Sasagawa

    • Tokyo Institute of Technology

  • Takeshi Kondo

    • Univ of Tokyo
    • University of Tokyo
    • Institute for Solid State Physics, University of Tokyo