Angle-resolved photoemission spectroscopy on wet-transferred highly oriented MoS2 monolayers on HOPG substrates

ORAL

Abstract

The ability to create a large area of monolayer 2D electronic materials with the same orientation on different substrates will play a very critical role for scalable flatland electronics. It has been shown that highly-oriented monolayer (ML) MoS2 can be grown on a carefully prepared sapphire substrate with nearly full coverage and transferred to different substrates [1]. However, it is still unclear whether such a transfer process will introduce unwanted defects that will affect the electronic structure. Here, we report successful preparation of high quality ML MoS2 transferred to HOPG substrates by using a wet transfer method. With a proper treatment, we reveal detailed electronic band structure using high resolution angle-resolved photoemission spectroscopy. Due to the fact that these MoS2 monolayers are highly oriented and interaction with a substrate is very weak [2], we are able to resolve the electronic band structure clearly including K point band splitting.
[1] Yu, Hua, et al.ACS nano,2017,11(12) [2] Miwa, Jill A., et al. Phys. Rev. Lett. 114, 046802(2015)

*Supported by Welch foundation F-1672, NSF MRSEC DMR-1720595, NSF EFMA-1542747, NSF DMR-1808751 and US AIRFORCE FA2386-18-1-4097

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Presenters

  • Woojoo Lee

    • Physics, University of Texas at Austin

Authors

  • Woojoo Lee

    • Physics, University of Texas at Austin

  • Li-Shuan Lu

    • Electrophysics, National Chiao Tung University
    • Department of Electrophysics, National Chiao Tung University
    • Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan
    • Department of Electrophysics, National Chiao Tung University, Taiwan

  • Wei-Chen Chueh

    • Electrophysics, National Chiao Tung University

  • Wen-Hao Chang

    • Electrophysics, National Chiao Tung University
    • Department of Electrophysics, National Chiao Tung University
    • Department of Electrophysics, National Chiao Tung University,
    • Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan
    • Department of Electrophysics, National Chiao Tung University, Taiwan

  • Chih-Kang Shih

    • Department of Physics, The University of Texas at Austin, Austin, Texas, 78712, USA.
    • University of Texas at Austin
    • Physics, University of Texas at Austin
    • Department of Physics, University of Texas at Austin, TX 78712, United States
    • Department of Physics, The University of Texas at Austin
    • Department of Physics, The University of Texas at Austin, USA