Exchange and the Coulomb blockade: peak height statistics in quantum dots

GONZALO USAJ; U BARANGER, HAROLD

PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS

Año: 2003 vol. 67 p. 1 - 1

0163-1829

We study the effect of the exchange interaction on the Coulomb blockade peak height statistics in chaoticquantum dots. Since exchange reduces the level repulsion in the many-body spectrum, it strongly affects thefluctuations of the peak conductance at finite temperature. We find that including exchange substantiallyimproves the description of the experimental data. Moreover, it provides further evidence of the presence ofhigh-spin states (S>1) in such systems