Proximity effects on the charge density wave order and superconductivity in single-layer NbSe<sub>2</sub>

ORAL

Abstract

Metallic transition metal dichalcogenides (TMDs) exhibit a rich variety of electronic phases. One of the factor influencing these phases is the presence of the substrate, as it triggers "proximity effects" on the 2D material such as screening, charge transfer, hybridization, strain, etc. In this work, we provide a comparative assessment of the impact of different substrates on the CDW and SC phases as well as the electronic structure of a model correlated 2D material. In particular, we study the electronic ground state of high-quality SL-NbSe2 grown by molecular beam epitaxy (MBE) on four substrates-BLG/SiC(0001), SL-h-BN/Ir(111), Au(111) and bulk WSe2. By combining low-temperature (340 mK) scanning tunneling microscopy/spectroscopy (STM/STS) and angle-resolved photoemission spectroscopy (ARPES), we compare their respective electronic structure.

*We acknowledge fruitful discussions with Fernando de Juan, Félix Ynduráin, Carmen Rubio-Verdú and Javier Zaldívar. We thank Marco Gobbi for carrying out check transport experiments. M.M.U. acknowledges support by the ERC Starting grant LINKSPM (Grant 758558) and by the Spanish MINECO under grant no. PID2020-116619GB-C21. J.A.M. acknowledges financial support from the Danish Council for Independent Research, Natural Sciences under the Sapere Aude program (grant no. DFF-6108-00409). A.C, M.B., J.A.M. and P.H. acknowledge support from the VILLUM FONDEN \emph{via}. the Centre of Excellence for Dirac Materials (Grant No. 11744). A.J.M.-G. acknowledges funding by the Spanish MINECO through Project no. PID2020-116619GA-C22. E.C. and S.M.-V. acknowledge the Spanish MICINN (Project PID2020-117152RB-I00 co-financed by FEDER and the Unit of Excellence “Maria de Maeztu” CEX2019-000919-M) and the Generalitat Valenciana (Prometeo Programme and PO FED

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Presenters

  • Rishav Harsh

    • Donostia International Physics Center

Authors

  • Rishav Harsh

    • Donostia International Physics Center

  • Paul L Dreher

    • Donostia International Physics Center

  • Wen Wan

    • Donostia International Physics Center

  • Alla Chikina

    • Aarhus University

  • Marco Bianchi

    • Aarhus University

  • Haojie Guo

    • Universidad Autonoma de Madrid

  • Samuel Manas

    • Universitat de Valencia

  • Eugenio Coronado

    • Universidad de Valencia
    • Universitat de Valencia,

  • Antonio Martinez-Galera

    • Universidad Autonoma de Madrid

  • Philip Hofmann

    • Aarhus University

  • Jill A Miwa

    • Aarhus University

  • Miguel M Ugeda

    • Donostia International Physics Center