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Anisotropic energy gap induced by charge density wave in kagome superconductors AV<sub>3</sub>Sb<sub>5</sub>

ORAL

Abstract

We have investigated the electronic structure of kagome superconductor AV3Sb5 by high-resolution angle-resolved photoemission spectroscopy (ARPES) [1,2], and observed multi-orbital nature of the valence-band structure in AV3Sb5. Our high-resolution measurements also revealed a drastic electronic reconstruction and an energy gap opening triggered by the charge-density-wave (CDW) transition. In this talk, we will show temperature and hν dependence of band structure across TCDW, and discuss the origin of CDW in terms of the electronic structure.

[1] K. Nakayama, T. Kato et al., Phys. Rev. B, in press (arXiv:2104.08042v2). [2] T. Kato et al., submitted.

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Publication: [1] K. Nakayama, T. Kato et al., Phys. Rev. B, in press (arXiv:2104.08042v2).<br>[2] T. Kato et al., submitted.

Presenters

  • Takemi Kato

    Tohoku University

Authors

  • Takemi Kato

    Tohoku University

  • Yongkai Li

    Beijing Institute of Technology

  • Tappei Kawakami

    Tohoku University

  • Min Liu

    Beijing Institute of Technology

  • Kosuke Nakayama

    Tohoku University

  • Zhiwei Wang

    Beijing Institute of Technology

  • Ayumi Moriya

    Tohoku University

  • Kiyohisa Tanaka

    Institute for Molecular Science

  • Takashi Takahashi

    Tohoku University

  • Yugui Yao

    Beijing Institute of Technology

  • T. Sato

    Tohoku University, Dept. Physics, CSRN, WPI-AIMR, SRIS, Tohoku Univ.