Dependence of quantum-Hall conductance on the edge-state equilibration position in a bipolar graphene sheet

Autor:	Ki, Dong-Keun, Nam, Seung-Geol, Lee, Hu-Jong, Oezyilmaz, Barbaros
Rok vydání:	2009
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.81.033301
Popis:	By using four-terminal configurations, we investigated the dependence of longitudinal and diagonal resistances of a graphene p-n interface on the quantum-Hall edge-state equilibration position. The resistance of a p-n device in our four-terminal scheme is asymmetric with respect to the zero point where the filling factor ($\nu$) of the entire graphene vanishes. This resistance asymmetry is caused by the chiral-direction-dependent change of the equilibration position and leads to a deeper insight into the equilibration process of the quantum-Hall edge states in a bipolar graphene system. Comment: 5 pages, 4 figures, will be published in PRB
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0912.2791 Zobrazit plný text záznamu View this record from Arxiv