On the thermal broadening of a quantum critical phase transition

Details On the thermal broadening of a quantum critical phase transition On the thermal broadening of a quantum critical phase transition

1999-03-16

arxiv.org/abs/cond-mat/9903246v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1016/S0038-1098(99)00346-4

The temperature dependence of an integer Quantum Hall effect transition is studied in a sample where the disorder is dominated by short-ranged potential scattering. At low temperatures the results are consistent with a $(T/T_0)^{\kappa}$ scaling behaviour and at higher temperatures by a linear dependence similar to that reported in other material systems. It is shown that the linear behaviour results from thermal broadening produced by the Fermi-Dirac distribution function and that the temperature dependence over the whole range depends only on the scaling parameter T$_0^{\kappa}$.

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