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arXiv 1802.04396cond-mat.mes-hall
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双层石墨烯中邻近诱导的拓扑相

Proximity-induced topological phases in bilayer graphene

Abdulrhman M. Alsharari, Mahmoud M. Asmar, Sergio E. Ulloa

摘要:

我们研究了在过渡金属二硫属化物单层膜上沉积双层石墨烯所诱导的相的能带结构。紧束缚和低能有效哈密顿量计算表明,在这些系统中诱导出具有自旋霍尔效应的拓扑非平凡相是可能的。我们分类散装绝缘相通过计算的Z $_2$不变量,这明确地确定了拓扑结构。这些和类似的混合系统下施加的栅极电压的研究打开了可调拓扑结构在实际实验系统的可能性。

英文摘要:

We study the band structure of phases induced by depositing bilayer graphene on a transition metal dichalcogenide monolayer. Tight-binding and low-energy effective Hamiltonian calculations show that it is possible to induce topologically nontrivial phases that should exhibit spin Hall effect in these systems. We classify bulk insulating phases through calculation of the Z$_2$ invariant, which unequivocally identifies the topology of the structure. The study of these and similar hybrid systems under applied gate voltage opens the possibility for tunable topological structures in real experimental systems.

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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