Thermopower of quantum chaos

Abstract The thermopower of a chaotic quantum dot has been studied in the Coulomb and the ballistic transport regime. Theoretical examinations predict distinct features for quantum dots where the electron trajectories are chaotic. Accordingly, we give experimental evidence for a residual effective charging energy in the case of asymmetric ajusted leads (G⩽2e2/h) and for non-Gaussian thermopower fluctuation distributions in the ballistic regime (G=4e2/h).