Charging of graphene by a magnetic field and the mechanical effect of magnetic oscillations.
Charging of graphene by a magnetic field and the mechanical effect of magnetic oscillations.
复制标题
磁场对石墨烯充电和磁振荡的机械效应。
DOI：
10.1088/0953-8984/25/49/496007
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Slizovskiy S
中科院分区：
文献类型：
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作者：
Slizovskiy S
我们讨论了石墨烯基器件的量子电容导致石墨烯电荷密度在外部磁场变化下发生变化的事实。电荷是守恒的，但会重新分布到基材或其他石墨烯片上。我们推导出理想石墨烯在强磁场中电荷重新分布的精确解析表达式。当我们考虑杂质和温度时，影响会减弱，并且公式会简化为标准量子电容表达式。强调了量子电容对于潜在卡西米尔力实验的重要性，并提出了相应的修正。
We discuss the fact that the quantum capacitance of graphene-based devices leads to variation of graphene charge density under changes of external magnetic field. The charge is conserved, but redistributes to the substrate or other graphene sheets. We derive an exact analytic expression for charge redistribution in the case of ideal graphene in a strong magnetic field. When we account for impurities and temperature, the effect decreases and the formulas reduce to standard quantum capacitance expressions. The importance of quantum capacitance for potential Casimir force experiments is emphasized and the corresponding corrections are worked out.