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arXiv 2004.10582cond-mat.mes-hall
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石墨烯中激子的应变诱导量子霍尔效应

Strain induced quantum Hall effect of excitons in graphene

Oleg L. Berman, Roman Ya. Kezerashvili, Yurii E. Lozovik, Klaus G. Ziegler

摘要:

我们研究了由单层和双层带隙石墨烯中的应变引起的均匀赝磁场对激子的作用。对于我们的分析,至关重要的是伪磁场作用于激子的组成粒子的电荷,即,电子和空穴,与磁场相比也是如此。此外,使用圆偏振激光场,电子和空穴可以仅在带隙石墨烯的蜂窝晶格的一个谷中被激发。这打破了时间反演对称性,并提供了可能性,观察各种量子霍尔现象在这个赝磁激子系统。我们的研究提出了复合粒子的量子霍尔效应的基本问题,为赝磁激子的量子霍尔物理铺平了道路。

英文摘要:

We study the effect of a uniform pseudomagnetic field, induced by a strain in a monolayer and double layer of gapped graphene, acting on excitons. For our analysis it is crucial that the pseudomagnetic field acts on the charges of the constituent particles of the excitons, i.e., the electrons and holes, the same way in contrast to a magnetic field. Moreover, using a circularly polarized laser field, the electrons and the holes can be excited only in one valley of the honeycomb lattice of gapped graphene. This breaks the time-reversal symmetry and provides the possibility to observe the various Quantum Hall phenomena in this pseudomagnetoexciton system. Our study poses a fundamental problem of the quantum Hall effect for composite particles and paves the way for quantum Hall physics of pseudomagnetoexcitons.

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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