arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.08938cond-mat.str-elcond-mat.mes-hall
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应变石墨烯和硅烯中的Work function、形变势和朗道能级的坍缩

Work function, deformation potential, and collapse of Landau levels in strained graphene and silicene

D. Grassano, M. D'Alessandro, O. Pulci, S. G. Sharapov, V. P. Gusynin, A. A. Varlamov

摘要:

我们进行了系统的{ \it ab initio}研究的功函数和它的均匀应变依赖石墨烯和硅烯的拉伸和压缩应变。还计算了与扶手椅和锯齿形应变相关的泊松比。基于这些结果,我们得到的变形势,应变电子学的关键,作为施加的应变的函数。此外,我们提出了一个特殊的实验装置与一个特殊的应变配置,只产生电场,而伪磁场是缺席。然后,施加一个真实的磁场,人们应该能够在实验上实现石墨烯或相关二维材料中朗道能级崩溃的壮观现象。

英文摘要:

We perform a systematic {\it ab initio} study of the work function and its uniform strain dependence for graphene and silicene for both tensile and compressive strains. The Poisson ratios associated with armchair and zigzag strains are also computed. Based on these results, we obtain the deformation potential, crucial for straintronics, as a function of the applied strain. Further, we propose a particular experimental setup with a special strain configuration that generates only the electric field, while the pseudomagnetic field is absent. Then, applying a real magnetic field, one should be able to realize experimentally the spectacular phenomenon of the collapse of Landau levels in graphene or related two-dimensional materials.

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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