Universal scaling in nonequilibrium transport through an Anderson impurity

JULIÁN RINCÓN, A. A. ALIGIA, AND K. HALLBERG

PHYSICAL REVIEW B

AMER PHYSICAL SOC

Año: 2009 vol. 79 p. 1213011 - 1213014

1098-0121

  Using nonequilibrium renormalized perturbation theory, we calculate the conductance G as a function oftemperature T and bias voltage V for an Anderson model suitable for describing transport properties through aquantum dot. For renormalized parameters that correspond to the extreme Kondo limit, we do not find a simplescaling formula beyond a quadratic dependence in T and V. However, if valence fluctuations are allowed, wefind excellent agreement with recent experiments.