Electrostatic screening and experimental evidence of a topological phase transition in a bulk quantum Hall liquid

Details Electrostatic screening and experimental evidence of a topological phase transition in a bulk quantum Hall liquid Electrostatic screening and experimental evidence of a topological phase transition in a bulk quantum Hall liquid

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009njph...11h3028m&link_type=abstract

New Journal of Physics, Volume 11, Issue 8, pp. 083028 (2009).

Physics

1

Scientific paper

The electrostatic screening of a medium disordered quantum Hall liquid was investigated using an electric field penetration (EFP) technique. At sufficiently low temperatures and at magnetic fields corresponding to the integral quantum Hall regime with even filling factors, two topologically different phases of the bulk electron liquid have been identified. By means of elementary analysis of experimental data it has further been shown that the transition between these phases reveals features typical of a Kosterlitz-Thouless type phase transition. Finally, the validity of the presented physical picture has been supported by means of numerical simulations of local filling factor topography.

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