Li Xiao, Zhang Fan, Niu Qian, MacDonald A H
Department of Physics, The University of Texas at Austin, Austin, Texas 78712, USA.
Department of Physics, University of Texas at Dallas, Richardson, Texas 75080, USA.
Phys Rev Lett. 2014 Sep 12;113(11):116803. doi: 10.1103/PhysRevLett.113.116803.
Bilayer graphene is susceptible to a family of unusual broken symmetry states with spin and valley dependent layer polarization. We report on a microscopic study of the domain walls in these systems, demonstrating that they have interesting microscopic structure related to the topological character of the ordered states. We use our results to show that the metal-insulator transition temperature in bilayer graphene is reduced from mean-field estimates by thermal excitation of domain walls.
双层石墨烯易受一类具有自旋和能谷依赖层极化的异常破缺对称态的影响。我们报道了对这些系统中畴壁的微观研究，证明它们具有与有序态的拓扑特征相关的有趣微观结构。我们利用我们的结果表明，双层石墨烯中的金属-绝缘体转变温度因畴壁的热激发而低于平均场估计值。
