期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 8, 期 23, 页码 5959-5965出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.7b02841
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资金
- National Natural Science Foundation of China [11404187, 11374190, 21333006]
- Taishan Scholar Program of Shandong Province
- Young Scholars Program of Shandong University (YSPSDU)
On the basis of electron electron self-energy corrections, quasiparticle band structures of Janus MoSSe and WSSe are identified, and the excitonic effects are demonstrated to play a dominate role in the optical response. Combining together MoSSe and WSSe monolayers to form vertical heterostructures (VHTs) and lateral heterostructures (LHTs) rarely leads to a simple arithmetic sum of their properties, giving rise to novel and unexpected behaviors. In particular, Rashba polarization can be enhanced in VHTs due to improved out-of-plane electric polarity. In the case of LHTs, photoresponse and absorption coefficients show optical activity in a wide visible light range. It is of interest that both VHTs and LHTs reveal type-II band alignment, enabling the separation of excitons. Besides, grain boundaries (GBs) of large angle (60 degrees) in Janus MoSSe due to chalcogen effects behave as one-dimensional (ID) metallic quantum wires, suggesting the possible formation of 1D electron or hole gas in such electronic heterostructures.
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