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arXiv 1301.3469cond-mat.mtrl-sci
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单层过渡金属二硫属化物电导率的应变调制

Strain-dependent modulation of conductivity in single layer transition-metal dichalcogenides

Mahdi Ghorbani-Asl, Stefano Borini, Agnieszka Kuc, Thomas Heine

摘要:

量子电导计算的MoS $_2$和WS $_2$的机械变形单分子膜进行使用非平衡格林函数方法结合的Landauer-Büttiker方法的弹道输运连同密度泛函的紧束缚(DFTB)方法。拉伸应变和压缩导致TMD单层的电子结构发生显着变化,最终过渡超导体-金属发生高达~11%的伸长率为2D各向同性变形的六方结构。这种转变增强了半导体材料中的电子输运。

英文摘要:

Quantum conductance calculations on the mechanically deformed monolayers of MoS$_2$ and WS$_2$ were performed using the non-equlibrium Green's functions method combined with the Landauer-Büttiker approach for ballistic transport together with the density-functional based tight binding (DFTB) method. Tensile strain and compression causes significant changes in the electronic structure of TMD single layers and eventually the transition semiconductor-metal occurs for elongations as large as ~11% for the 2D-isotropic deformations in the hexagonal structure. This transition enhances the electron transport in otherwise semiconducting materials.

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