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arXiv 0811.0574cond-mat.mes-hall
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双层石墨烯中的长程库仑相互作用

Long range Coulomb interaction in bilayer graphene

D. S. L. Abergel, Tapash Chakraborty

摘要:

本文报道了在磁场中双层石墨烯中电子相互作用的研究。我们表明,在这种材料中的电子之间的长程库仑相互作用是非常重要的,并在最近的光学磁吸收实验中的带不对称性帐户。我们表明,在无偏双层(两层处于相同的静电势)中,相互作用可以导致中等磁场中朗道能级的混合。对于偏置双层(当两层是在不同的电位),我们证明了相互作用是负责的基态的总自旋的变化为半满朗道能级的价带。

英文摘要:

We report on our studies of interacting electrons in bilayer graphene in a magnetic field. We demonstrate that the long range Coulomb interactions between electrons in this material are highly important and account for the band asymmetry in recent optical magneto-absorption experiments. We show that in the unbiased bilayer (where both layers are at the same electrostatic potential), the interactions can cause mixing of Landau levels in moderate magnetic fields. For the biased bilayer (when the two layers are at different potentials), we demonstrate that the interactions are responsible for a change in the total spin of the ground state for half-filled Landau levels in the valence band.

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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