Author(s): Zhang, X (Zhang, Xi); Zhu, TS (Zhu, Tongshuai); Huang, JW (Huang, Junwei); Wang, Q (Wang, Qian); Cong, X (Cong, Xin); Bi, XY (Bi, Xiangyu); Tang, M (Tang, Ming); Zhang, CR (Zhang, Caorong); Zhou, L (Zhou, Ling); Zhang, DQ (Zhang, Dongqin); Su, T (Su, Tong); Dai, XT (Dai, Xueting); Meng, K (Meng, Kui); Li, ZY (Li, Zeya); Qu, CY (Qu, Caiyu); Zhao, WW (Zhao, Wei-Wei); Tan, PH (Tan, Ping-Heng); Zhang, HJ (Zhang, Haijun); Yuan, HT (Yuan, Hongtao)

Source: ACS APPLIED MATERIALS & INTERFACES Volume: 12 Issue: 41 Pages: 46900-46907 DOI: 10.1021/acsami.0c12165 Published: OCT 14 2020

Abstract: Interlayer coupling in two-dimensional (2D) layered materials plays an important role in controlling their properties. 2H- and 3R-MoS2 with different stacking orders and the resulting interlayer coupling have been recently discovered to have different band structures and a contrast behavior in valley physics. However, the role of carrier doping in interlayer coupling in 2D materials remains elusive. Here, based on the electric double layer interface, we demonstrated the experimental observation of carrier doping-enhanced interlayer coupling in 3R-MoS2. A remarkable tuning of interlayer Raman modes can be observed by changing the stacking sequence and carrier doping near their monolayer limit. The modulated interlayer vibration modes originated from the interlayer coupling show a doping-induced blue shift and are supposed to be associated with the interlayer coupling enhancement, which is further verified using our first-principles calculations. Such an electrical control of interlayer coupling of layered materials in an electrical gating geometry provides a new degree of freedom to modify the physical properties in 2D materials.

Accession Number: WOS:000582345700121

PubMed ID: 32931238

Author Identifiers:

Author        Web of Science ResearcherID        ORCID Number

Zhang, Haijun                  0000-0002-9958-1102

ISSN: 1944-8244

eISSN: 1944-8252

Full Text: https://pubs.acs.org/doi/10.1021/acsami.0c12165