Non-fermi liquid criticality and superuniversality in the quantum hall regime
Abstract
The results of a microscopic theory, based on the topological concept of a θ vacuum, which show that the Coulomb potential, unlike any finite-ranged interaction potential, renders the long-standing problem of the plateau transitions in the quantum Hall regime like a non-Fermi liquid are reported. These results, which are important for quantum-phase transitions in general and composite fermion ideas in particular, provide a novel understanding of the critical exponent values that have recently been (re-)taken from a series of state-of-the-art quantum Hall samples.
- Publication:
-
Soviet Journal of Experimental and Theoretical Physics Letters
- Pub Date:
- April 2008
- DOI:
- 10.1134/S0021364008040097
- Bibcode:
- 2008JETPL..87..220P
- Keywords:
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- 71.10.Pm;
- 72.10.-d;
- 73.43.-f