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Layer-dependent charge density wave in few layer VSe<sub>2</sub> films

ORAL

Abstract

VSe2 monolayer (ML) has recently attracted attention about charge ordering property in two-dimensional limit. Researches have been discussing the origin of charge ordering characteristic of VSe2 ML and there is an inconsistent argument. We have reported two types of charge-ordering transitions in VSe2 ML on graphene substrates. One is enhanced charge density wave (CDW) originated from bulk VSe2 and one is metal-insulator transition (MIT) caused by interface effect between graphene and VSe2 ML. In this presentation, we present layer dependent CDW properties in VSe2 1ML, 2ML and 3ML on graphene substrates. We will show depressed CDW effects with increasing number of layers. We will also discuss the MIT property of VSe2 monolayer changing substrates and implications of interface effect between substrate and VSe2 ML.

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Presenters

  • Byoung Ki Choi

    Department of Physics, University of Seoul, Seoul 02504, Republic of Korea, Department of Physics, University of Seoul, Republic of Korea

Authors

  • Byoung Ki Choi

    Department of Physics, University of Seoul, Seoul 02504, Republic of Korea, Department of Physics, University of Seoul, Republic of Korea

  • Ganbat Duvjir

    Department of Physics, University of Ulsan, Republic of Korea

  • Søren Ulstrup

    Department of Physics and Astronomy, Aarhus University, Denmark

  • In Hak Lee

    Department of Physics, University of Seoul, Seoul 02504, Republic of Korea, Department of Physics, University of Seoul, Republic of Korea

  • Hyuk Jin Kim

    Department of Physics, University of Seoul, Republic of Korea

  • Ly Thi Trinh

    Department of Physics, University of Ulsan, Republic of Korea

  • Chris Jozwiak

    Advanced Light Source, Lawrence Berkeley National Lab, Lawrence Berkeley National Laboratory, Advanced Light Source, Lawrence Berkeley National Laboratory, Advanced Light Source, E. O. Lawrence Berkeley National Laboratory, ALS, Lawrence Berkeley National Lab, Advanced Light Source

  • Aaron Bostwick

    Advanced Light Source, Lawrence Berkeley National Laboratory, Lawrence Berkeley National Laboratory, Advanced Light Source, Lawrence Berkeley National Lab, Advanced Light Source, E. O. Lawrence Berkeley National Laboratory, ALS, Lawrence Berkeley National Lab, Advanced Light Source

  • Eli Rotenberg

    Advanced Light Source, Lawrence Berkeley National Laboratory, Lawrence Berkeley National Laboratory, Advanced Light Source, Lawrence Berkeley National Lab, Advanced Light Source, E. O. Lawrence Berkeley National Laboratory, ALS, Lawrence Berkeley National Lab, Advanced Light Source

  • Jungdae Kim

    Department of Physics, University of Ulsan, Republic of Korea

  • Young Jun Chang

    University of Seoul, Department of Physics, University of Seoul, Seoul 02504, Republic of Korea, Department of Physics, University of Seoul, Republic of Korea