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arXiv 1503.01301cond-mat.mes-hall
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单层MoS $_{2}$的应变诱导迁移率调制

Strain induced mobility modulation in single-layer MoS$_{2}$

Manouchehr Hosseini, Mohammad Elahi, Mahdi Pourfath, David Esseni

摘要:

本文研究了温度T $>$ 100 K时,双轴和单轴应变对单层MoS $_{2}$迁移率的影响。从本征声子模式,远程声子和带电杂质的散射被认为是随着静态屏蔽。利用从头算模拟研究了应变对电子能带结构的影响,并利用线性化的Boltzmann输运方程计算了不同应变条件下的低场迁移率.结果表明,在扶手椅方向上,材料的迁移率随拉伸双轴应变和拉伸单轴应变的增加而增加。然而,在压缩应变下,当应变大小变化时,迁移率表现出非单调行为。特别地,在1%的相对小的压缩应变的情况下,与未应变的条件相比,迁移率降低了约两倍,但是在较大的压缩应变的情况下,迁移率部分地恢复了这种退化。

英文摘要:

In this paper the effect of biaxial and uniaxial strain on the mobility of single-layer MoS$_{2}$ for temperatures T $>$ 100 K is investigated. Scattering from intrinsic phonon modes, remote phonon and charged impurities are considered along with static screening. Ab-initio simulations are utilized to investigate the strain induced effects on the electronic bandstructure and the linearized Boltzmann transport equation is used to evaluate the low-field mobility under various strain conditions. The results indicate that the mobility increases with tensile biaxial and tensile uniaxial strain along the armchair direction. Under compressive strain, however, the mobility exhibits a non-monotonic behavior when the strain magnitude is varied. In particular, with a relatively small compressive strain of 1% the mobility is reduced by about a factor of two compared to the unstrained condition, but with a larger compressive strain the mobility partly recovers such a degradation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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