Effects of spin and exchange interaction on the Coulomb-blockade peak statistics in quantum dots

Abstract

We derive a closed expression for the linear conductance through a quantum dot in the Coulomb-blockade regime in the presence of a constant exchange interaction. With this expression we calculate the temperature dependence of the conductance peak-height and peak-spacing statistics. Using a realistic value of the exchange interaction, we find significantly better agreement with experimental data as compared with the statistics obtained in the absence of an exchange interaction.

4 pages, 4 figures, revtex4, typos corrected