Temperature-dependent correlation function of magnetoconductance quantum fluctuations in a stadium quantum dot

Abstract

The temperature dependence of weak localization and conductance fluctuations in a ballistic quantum dot stadium was studied, where the experimental data of measurements could be best fitted by including both dephasing effects of electron scatterings and thermal smearing of the states around the Fermi energy. We observed a crossover change in correlation function of fluctuations from a Lorentzian-squared form to a simple Lorentzian form as temperature was changed from low-temperature (50 mK) to high-temperature (300 mK) regimes.