Quantum well states in Cs thin films epitaxially grown on the kagome superconductor CsV3Sb5

ORAL

Abstract

We have investigated effects of Cs overdosing to the kagome superconductor CsV3Sb5 by angle-resolved photoemission spectroscopy [1, 2], and found unexpected formation of alkali-metal thin films and quantum well states in the films.

In this presentation, we will show thickness control of the Cs thin films and discuss the structural stability with results of first-principles calculations.



[1] K. Nakayama et al., Phys. Rev. X 12, 011001 (2022).

[2] T. Kato et al., submitted.

* This work was supported by JST-CREST (Grant No. JPMJCR18T1), Grant-in-Aid for Scientific Research (JSPS KAKENHI Grant No. JP21H04435, No. JP23H01115, and No. JP23KJ0099), UVSOR (Proposal No. 22IMS6838 and No. 23IMS6649), the Sasakawa Scientific Research Grant from the Japan Science Society, the National Key R&D Program of China Grant No. 2020YFA0308800 and No. 2022YFA1403400), the Natural Science Foundation of China (Grant No. 92065109), the Beijing Natural Science Foundation (Grant No. Z210006), GP-Spin at Tohoku University, JST-SPRING (Grant No. JPMJSP2114), and the Analysis & Testing Center at BIT.

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Publication: [1] K. Nakayama et al., Phys. Rev. X 12, 011001 (2022).
[2] T. Kato et al., submitted.

Presenters

  • Takemi Kato

    Tohoku University

Authors

  • Takemi Kato

    Tohoku University

  • Kosuke Nakayama

    Department of Physics, Graduate School of Science, Tohoku University, Tohoku University, Tohoku Universitry

  • Yongkai Li

    Beijing Institute of Technology

  • Zhiwei Wang

    Beijing Institute of Technology

  • Katsuaki Sugawara

    Department of Physics, Graduate School of Science, Tohoku University, Tohoku University

  • Kiyohisa Tanaka

    UVSOR Synchrotron Facility, UVSOR

  • Takashi Takahashi

    Department of Physics, Graduate School of Science, Tohoku University, Tohoku Univ, Tohoku University

  • Yugui Yao

    Beijing Institute of Technology

  • Takafumi Sato

    Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Tohoku University