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arXiv 1401.1801cond-mat.mes-hallcond-mat.mtrl-sci
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黑磷中的应变诱导能隙修正

Strain-induced gap modification in black phosphorus

A. S. Rodin, A. Carvalho, A. H. Castro Neto

摘要:

利用密度泛函理论和紧束缚模型预测了单层黑磷的能带结构和应变效应。从第一性原理确定了各个能带的定域轨道组成后,我们利用系统对称性写下了在$Γ$点的有效低能哈密顿量。从数值计算和参数的基础上的材料的晶体结构,我们表明,在垂直于平面的方向上的变形可以用来改变间隙的大小,并诱导超导体-金属过渡。

英文摘要:

The band structure of single-layer black phosphorus and the effect of strain are predicted using density functional theory and tight-binding models. Having determined the localized orbital composition of the individual bands from first-principles, we use the system symmetry to write down the effective low-energy Hamiltonian at the $Γ$ point. From numerical calculations and arguments based on the crystal structure of the material, we show that the deformation in the direction normal to the plane can be use to change the gap size and induce a semiconductor-metal transition.

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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