Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session F11: Local Characterization of Moirés in Transition Metal Dichalcogenides
8:00 AM–10:12 AM,
Tuesday, March 5, 2024
Room: M100B
Sponsoring
Unit:
DCMP
Chair: Brian LeRoy, University of Arizona
Abstract: F11.00011 : Twisted WSe2 as a Candidate Chern Insulator
10:00 AM–10:12 AM
Presenter:
Fan Zhang
(University of Texas at Austin)
Authors:
Fan Zhang
(University of Texas at Austin)
Yanxing Li
(The University of Texas at Austin)
Nicolás Morales-Durán
(University of Texas at Austin)
Wang Yao
(The University of Hong Kong)
Jung-Jung Su
(Natl Chiao Tung Univ)
Yu-Chuan Lin
(Natl Chiao Tung Univ)
Chengye Dong
(Pennsylvania State University)
Hyunsue Kim
(University of Texas at Austin)
Joshua A Robinson
(Pennsylvania State University)
Allan H MacDonald
(University of Texas at Austin)
Chih-Kang Shih
(University of Texas at Austin)
Here we report on experimental evidence that twisted WSe2 bilayers might be another good candidate. Our constant height scanning tunneling spectroscopies (CHSTS) reveal the moiré potential modulation for G-valley. Using constant current STS, we map out the electronic state of the K-valley within the moiré superlattice revealing that the K-valley states are at the VBM. In addition, K-valley STS mapping reveals opposite polarizations of the wavefunction between the MX and XM sites, establishing the theoretically predicted pseudospin texture.
[1] Park, H.et al., Nature 622, 74–79 (2023).
[2] Nicolás Morales-Durán et al. arXiv:2308.03143
[3] Yu et. al., National Science Review 7, 1, 12–20 (2020)
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