Evidence for the Luttigger liquid density of states in transport across the incompressible stripe at fractional filling factorsE. V. Deviatov1, A. A. Kapustin1, V. T. Dolgopolov1, A. Lorke2, D. Reuter3 and A. D. Wieck3
1 Institute of Solid State Physics RAS - Chernogolovka, Moscow District 142432, Russia
2 Laboratorium für Festkörperphysik, Universität Duisburg-Essen - Lotharstr. 1, D-47048 Duisburg, Germany
3 Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum - Universitätsstrasse 150, D-44780 Bochum, Germany
received 3 November 2006; accepted in final form 29 November 2006; published February 2007
published online 23 January 2007
We experimentally investigate transport across the incompressible stripe at the sample edge in the fractional quantum Hall effect regime at bulk filling factors and . We obtain the dependence of the equilibration length, that is a phenomenological characteristics of the transport, on the voltage imbalance and the temperature, at high voltage imbalances. These dependencies are found to be of the power law form, which is a strong evidence for the Luttigger liquid density of states.
73.40.Qv - Metal-insulator-semiconductor structures (including semiconductor- to-insulator) .
71.30.+h - Metal-insulator transitions and other electronic transitions.
© Europhysics Letters Association 2007