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Possible existence of a band of extended states induced by inter-Landau-band mixing in a quantum Hall system

Authors Xiong, G.
Wang, SD
Niu, Q.
Wang, YP
Xie, XC
Tian, DC
Wang, XR View this author's profile
Issue Date 2006
Source Journal OF physics-condensed MATTER , v. 18, (6), 2006, FEB 15, p. 2029-2055
Summary The mixing of states with opposite chiralities in a quantum Hall system is shown to have a delocalization effect. It is possible that extended states may form bands because of this mixing, as is shown through a numerical calculation on a two-channel network model. Based on this result, a new phase diagram with a narrow metallic phase separating two adjacent QH phases and/or separating a QH phase from the insulating phase is proposed. The data from recent non-scaling experiments are reanalysed and it is shown that they seem to be consistent with the new phase diagram. However, due to finite-size effects, further study on large system size is still needed to conclude whether there are extended state bands in the thermodynamic limit.
ISSN 0953-8984
Rights Journal of physics. Condensed matter © copyright (2006) IOP Publishing Ltd. The Journal's web site is located at
Language English
Format Article
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