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|Title: ||Possible existence of a band of extended states induced by inter-Landau-band mixing in a quantum Hall system|
|Authors: ||Xiong, Gang|
Xie, X. C.
Quantum Hall effect
|Issue Date: ||27-Jan-2006 |
|Citation: ||Journal of physics. Condensed matter, v. 18, 2006, p. 2029–2055|
|Abstract: ||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.|
|Rights: ||Journal of physics. Condensed matter © copyright (2006) IOP Publishing Ltd. The Journal's web site is located at http://www.iop.org/EJ/journal/0953-8984/|
|Appears in Collections:||PHYS Journal/Magazine Articles|
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