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arXiv 0904.0040cond-mat.mes-hallcond-mat.str-el
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双层石墨烯中的电荷2e skyrmions

Charge 2e skyrmions in bilayer graphene

D. A. Abanin, S. A. Parameswaran, S. L. Sondhi

摘要:

考虑了双层石墨烯中第零朗道能级的八倍简并度的相互作用诱导提升所产生的量子霍尔态。我们表明,在均匀的填充因子电荷注入到系统中的电荷$2e$ skyrmions的形式。这是一个罕见的例子,在一个纯粹的排斥相互作用的系统中的电荷结合。我们计算了Skyrmion的能量和尺寸作为塞曼相互作用的函数,并讨论了在扫描隧道显微镜实验中电荷$2e$ Skyrmion的签名。

英文摘要:

Quantum Hall states that result from interaction induced lifting of the eight-fold degeneracy of the zeroth Landau level in bilayer graphene are considered. We show that at even filling factors electric charge is injected into the system in the form of charge $2e$ skyrmions. This is a rare example of binding of charges in a system with purely repulsive interactions. We calculate the skyrmion energy and size as a function of the Zeeman interaction, and discuss signatures of the charge $2e$ skyrmions in the scanning tunneling microscopy experiments.

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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