Many-body corrections to cyclotron resonance in monolayer and bilayer graphene
Many-body corrections to cyclotron resonance in monolayer and bilayer graphene
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DOI：
10.1103/physrevb.81.075407
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发表时间：
2009-11
影响因子：
3.7
通讯作者：
K. Shizuya
中科院分区：
文献类型：
--
作者：
K. Shizuya
研究了石墨烯中的回旋共振，重点是对共振能量的多体修正，这避开了Kohn定理。真正的多体修正原来来自真空极化，特别是石墨烯，它在短波长下发散。特别强调的是需要重整化，它允许一个确定多体校正唯一从一个共振到另一个。特别是对于双层石墨烯，层内和层间耦合强度都经历了无限重正化;因此，重正化速度和层间耦合强度随磁场变化。单层和双层石墨烯的理论与实验数据的比较。
Cyclotron resonance in graphene is studied with focus on many-body corrections to the resonance energies, which evade Kohn's theorem. The genuine many-body corrections turn out to derive from vacuum polarization, specific to graphene, which diverges at short wavelengths. Special emphasis is placed on the need for renormalization, which allows one to determine many-body corrections uniquely from one resonance to another. For bilayer graphene, in particular, both intralayer and interlayer coupling strengths undergo infinite renormalization; as a result, the renormalized velocity and interlayer coupling strength run with the magnetic field. A comparison of theory with the experimental data is made for both monolayer and bilayer graphene.