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The effect of alloying on the band engineering of two-dimensional transition metal dichalcogenides

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成果类型:
期刊论文
作者:
JianshengDong;YipengZhao;GangOuyang
作者机构:
Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications (SICQEA), Hunan Normal University, Changsha 410081, China
语种:
中文
期刊:
Physica E: Low-dimensional Systems and Nanostructures
ISSN:
1386-9477
年:
2019
卷:
105
页码:
90-96
机构署名:
本校为第一机构
院系归属:
物理与信息科学学院
摘要:
In order to clarify the alloying effect on the band engineering in two-dimensional transition metal dichalcogenides (2D-TMDs) at the atomic level, we present a quantitative study to address a deeper insight on the relationship between the bond identities and band shift based on the bond relaxation mechanism and valance-force-field approach. We find the interaction parameter in 2D-TMDs alloys could be obtained from the lattice distortion energy and further reveal the bowing mechanism of composition tunable bandgap in 2D-TMDs. Our results show that the composition-dependent band shift is in good agreement with the available evidence, which suggest the tunable electronic properties of 2D-TMD alloys that realized by modulating the chemical composition could be helpful for nanoelectronic applications.

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