https://doi.org/10.1140/epjb/s10051-022-00374-1
Regular Article - Mesoscopic and Nanoscale Systems
Electron transport properties of the transition metal dichalcogenides composite WX2-MoX2 (X≡S, Se, Te) nanowires under the external strain
1
College of Physics, Mechanical and Electrical Engineering, Jishou University, 416000, Jishou, China
2
College of Information Science and Engineering, Jishou University, 416000, Jishou, China
3
Key Laboratory of Mineral Cleaner Production and Exploit of Green Functional Materials in Hunan Province, Jishou University, 416000, Jishou, China
Received:
23
March
2022
Accepted:
22
June
2022
Published online:
11
July
2022
We have investigated the electronic structure and transport properties of the transition metal dichalcogenides composite WX2-MoX2 (X≡S, Se, Te) nanowires under the external strain, in the method of the first-principles calculation combining the Density functional theory (DFT) and the Non-equilibrium Green’s function (NEGF). First, we have designed the two terminal electron transport devices based on the stable transition metal dichalcogenides (TMDs) WX2-MoX2 (X≡S, Se, Te) composite nanowires for the first time. Second, the electronic structure and transport properties of the WS2-MoS2 composite nanowire have been demonstrated to be more sensitive to the external strain when compared to that of the composite WSe2/Te2-MoSe2/Te2 nanowires, the external compressive strain may significantly enchance the differential negative resistance (DNR) effect of the WSe2-MoSe2 composite nanowire based device, while the stretch strain should induce the interesting DNR in the WTe2-MoTe2 composite nanowire device. Finally, the obtained results have been physically explained from the integral area of the transmission coefficient in the bias voltage window, and may be of importance in the design of the nanoelectronic devices based on transition metal dichalcogenides composites.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2022