Tuning Valleys and Wave Functions of van der Waals Heterostructures by Varying the Number of Layers: A First-Principles Study.
Tuning Valleys and Wave Functions of van der Waals Heterostructures by Varying the Number of Layers: A First-Principles Study.
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通过改变层数来调节范德华异质结构的谷和波函数:第一性原理研究
DOI:
10.1002/smll.202008153
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发表时间:
2021
期刊:
影响因子:
13.3
通讯作者:
A. B. Kuc
中科院分区:
文献类型:
--
作者:
M. S. Ramzan;J. Kunstmann;A. B. Kuc
In van der Waals heterostructures of 2D transition‐metal dichalcogenides (2D TMDCs) electron and hole states are spatially localized in different layers forming long‐lived interlayer excitons. Here, the influence of additional electron or hole layers on the electronic properties of a MoS2/WSe2heterobilayer (HBL), which is a direct bandgap material, is investigated from first principles. Additional layers modify the interlayer hybridization, mostly affecting the quasiparticle energy and real‐space extend of hole states at the Γ and electron states at theQvalleys. For a sufficient number of additional layers, the band edges move fromKtoQor Γ, respectively. Adding electron layers to the HBL leads to more delocalizedKandQstates, while Γ states do not extend much beyond the HBL, even when more hole layers are added. These results suggest a simple and yet powerful way to tune band edges and the real‐space extent of the electron and hole wave functions in TMDC heterostructures, potentially affecting strongly the lifetime and dynamics of interlayer excitons.
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DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
B. Barbiellini;A. Bansil
通讯作者:
A. Bansil
影响因子:
41.2
作者:
Yuan, Long;Zheng, Biyuan;Huang, Libai
通讯作者:
Huang, Libai
影响因子:
64.8
作者:
Kha Tran;Moody, Galan;Li, Xiaoqin
通讯作者:
Li, Xiaoqin
影响因子:
41.2
作者:
Withers, F.;Del Pozo-Zamudio, O.;Novoselov, K. S.
通讯作者:
Novoselov, K. S.
影响因子:
41.2
作者:
Mak, Kin Fai;He, Keliang;Shan, Jie
通讯作者:
Shan, Jie