Specific Heat of a Fractional Quantum Hall System
Abstract
Using a time-resolved phonon absorption technique, we have measured the specific heat of a two-dimensional electron system in the fractional quantum Hall effect regime. For filling factors and 1/3 the specific heat displays a strong exponential temperature dependence in agreement with excitations across a quasi-particle gap. At filling factor we were able to measure the specific heat of a composite fermion system for the first time. The observed linear temperature dependence on temperature down to K agrees well with early predictions for a Fermi liquid of composite fermions.
Keywords
Cite
@article{arxiv.cond-mat/0607167,
title = {Specific Heat of a Fractional Quantum Hall System},
author = {F. Schulze-Wischeler and U. Zeitler and C. v. Zobeltitz and F. Hohls and D. Reuter and A. D. Wieck and H. Frahm and R. J. Haug},
journal= {arXiv preprint arXiv:cond-mat/0607167},
year = {2009}
}
Comments
4 pages, 4 figures (version is 1. resubmission: Added a paragraph to include the problems which arise by the weak temperature dependence at \nu = 1/2, updated affiliation)