Location of Repository

Universality and phase diagram around half-filled Landau level

By L. W. Wong, H. W. Jiang and W. J. Schaff

Abstract

Gated GaAs/AlxGaAs1−x heterostructures were used to determine the low temperature behavior of the two-dimensional electron gas near filling factor ν = 1 in the disorder-magnetic field plane. We identify a line on which 2 σxy is temperature independent, has value σxy = 0.5±0.02 (e2/h), and a distinct line on which ρxy = 2±0.04 (h/e2). The phase boundaries between the Hall insulator and the principal quantum Hall liquids at ν = 1 and 1 3 show levitation of the delocalized states of the first Landau level for electrons and composite fermions. Finally, data suggests that there is no true metallic phase around ν =

Year: 2008
OAI identifier: oai:CiteSeerX.psu:10.1.1.305.8382
Provided by: CiteSeerX
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://citeseerx.ist.psu.edu/v... (external link)
  • http://arxiv.org/pdf/cond-mat/... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.