石墨烯中无序展宽朗道子带的形状。

Shape of disorder-broadened Landau subbands in graphene.

作者信息

Zhu W, Shi Q W, Wang X R, Chen J, Yang J L, Hou J G

机构信息

Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China.

出版信息

Phys Rev Lett. 2009 Feb 6;102(5):056803. doi: 10.1103/PhysRevLett.102.056803. Epub 2009 Feb 3.

DOI:10.1103/PhysRevLett.102.056803

PMID:19257535

Abstract

In this Letter, we calculate the density of states of graphene under a highly uniform magnetic field and white-noise random potential. We discover that the disorder-broadened zero-energy Landau band has a Gaussian shape and its width is proportional to the random potential variance and the square root of magnetic field. We also use the Wegner-type calculation to justify our simulation results.

摘要

在本信函中，我们计算了在高度均匀磁场和白噪声随机势场下石墨烯的态密度。我们发现，无序展宽的零能朗道带具有高斯形状，其宽度与随机势方差和磁场平方根成正比。我们还使用韦格纳型计算来验证我们的模拟结果。