Fuchs Jean-Noël, Lederer Pascal
Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, UMR 8502, F-91405 Orsay, France.
Phys Rev Lett. 2007 Jan 5;98(1):016803. doi: 10.1103/PhysRevLett.98.016803. Epub 2007 Jan 4.
We propose that the inversion symmetry of the graphene honeycomb lattice is spontaneously broken via a magnetic-field-dependent Peierls distortion. This leads to valley splitting of the n=0 Landau level but not of the other Landau levels. Compared to Quantum Hall valley ferromagnetism recently discussed in the literature, lattice distortion provides an alternative explanation to all of the currently observed Quantum Hall plateaus in graphene.
我们提出，石墨烯蜂窝晶格的反演对称性通过与磁场相关的派尔斯畸变而自发破缺。这导致n = 0朗道能级的能谷分裂，但其他朗道能级不会发生能谷分裂。与最近文献中讨论的量子霍尔能谷铁磁性相比，晶格畸变对目前在石墨烯中观测到的所有量子霍尔平台提供了另一种解释。
