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arXiv 0906.2194cond-mat.str-el
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无序石墨烯的磁性和磁输运

Magnetism and magnetotransport in disordered graphene

T. G. Rappoport, Bruno Uchoa, A. H. Castro Neto

摘要:

利用蒙特卡罗模拟研究了磁性吸附原子覆盖的单层石墨烯的结构有序性和磁性有序性的相互作用。我们认为石墨烯结构中波纹的存在可以导致吸附原子的聚集和各种磁性状态,如超顺磁性,反铁磁性,铁磁性和自旋玻璃行为。我们推导出的磁化滞后,也在可变范围跳跃制度的磁阻曲线,这可以提供实验签名的波纹引起的集群和磁性。我们提出石墨烯的磁性状态可以通过栅极电压和覆盖率来控制。

英文摘要:

We perform Monte Carlo simulations to study the interplay of structural and magnetic order in single layer graphene covered with magnetic adatoms. We propose that the presence of ripples in the graphene structure can lead to clustering of the adatoms and to a variety of magnetic states such as super-paramagnetism, antiferromagnetism, ferromagnetism and spin glass behavior. We derive the magnetization hysteresis and also the magnetoresistance curves in the variable range hopping regime, which can provide experimental signatures for ripple induced clustering and magnetism. We propose that the magnetic states in graphene can be controlled by gate voltage and coverage fraction.

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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