Interaction-induced shift of the cyclotron resonance of graphene using infrared spectroscopy - Condensed Matter > Mesoscale and Nanoscale PhysicsReportar como inadecuado




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Abstract: We report a study of the cyclotron resonance CR transitions to and from theunusual $n=0$ Landau level LL in monolayer graphene. Unexpectedly, we findthe CR transition energy exhibits large up to 10% and non-monotonic shifts asa function of the LL filling factor, with the energy being largest athalf-filling of the $n=0$ level. The magnitude of these shifts, and theirmagnetic field dependence, suggests that an interaction-enhanced energy gapopens in the $n=0$ level at high magnetic fields. Such interaction effectsnormally have limited impact on the CR due to Kohn-s theorem W. Kohn, Phys.Rev. {\bf 123}, 1242 1961, which does not apply in graphene as a consequenceof the underlying linear band structure.



Autor: E. A. Henriksen, P. Cadden-Zimansky, Z. Jiang, Z. Q. Li, L.-C. Tung, M. E. Schwartz, M. Takita, Y.-J. Wang, P. Kim, H. L. Stormer

Fuente: https://arxiv.org/



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