Micro-ARPES study of the kagome superconductor CsV<sub>3</sub>Sb<sub>5</sub>

ORAL

Abstract

We have investigated the electronic structure of the kagome superconductor CsV3Sb5 by micro-focused angle-resolved photoemission spectroscopy [1, 2]. We found evidence for the polar nature of the cleaved surface which is characterized by Cs- and Sb-terminated surfaces with markedly different fermiology.

In this presentation, we will show temperature dependence of the band structure for Cs- and Sb-terminated surfaces, and discuss the origin of the charge density wave.

[1] T. Kato et al., Phys. Rev. B, 106, L121112 (2022). [2] T. Kato et al., Phys. Rev. Lett. in press.

*This work was supported by JST-CREST (Grant No. JPMJCR18T1), JST-PRESTO (Grant No. JPMJPR18L7), Grant-in-Aid for Scientific Research (JSPS KAKENHI Grants No. JP21H04435 and No. JP20H01847), KEK-PF (Proposal No. 2021S2-001), and the Sasakawa Scientific Research Grant from the Japan Science Society, the National Key R&D Program of China (Grant No. 2020YFA0308800), the Natural Science Foundation of China (Grant No. 92065109), the Beijing Natural Science Foundation (Grant No. Z210006), the Beijing Institute of Technology (BIT) Research Fund Program for Young Scholars (Grant No. 3180012222011), GP-Spin at Tohoku University, JST-SPRING (Grant No. JPMJSP2114), and the Analysis & Testing Center at BIT.

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Publication: T. Kato et al., Phys. Rev. B, 106, L121112 (2022).
T. Kato et al., Phys. Rev. Lett. in press.

Presenters

  • Takemi Kato

    • Tohoku University

Authors

  • Takemi Kato

    • Tohoku University

  • Yongkai Li

    • Beijing Institute of Technology

  • Kosuke Nakayama

    • Tohoku University

  • Zhiwei Wang

    • Beijing Institute of Technology

  • Seigo Souma

    • Tohoku University

  • Miho Kitamura

    • Photon Factory KEK IMSS
    • KEK-IMSS-PF
    • High Energy Accelerator Research Organization
    • High Energy Accelerator Research Organization (KEK)

  • Koji Horiba

    • QST
    • National Institutes for Quantum Science and Technology

  • Hiroshi Kumigashira

    • Tohoku University

  • Takashi Takahashi

    • Tohoku Univ
    • Tohoku University

  • Takafumi Sato

    • Tohoku University
    • WPI-AIMR, Tohoku University