Universal fluctuations of Coulomb blockade peaks in quantum dots

Abstract

We describe recent measurements of the statistics and parametric correlations of Coulomb blockade peak heights in shape-deformable GaAs/AlxGa1-x As quantum dots. We find good agreement between the measured distributions of peak heights and probability distributions predicted by random matrix theory for both B = 0 and B ≠ 0. The measured magnetic flux correlation length φc is of the order of but less than one flux quantum through the dot, φc ∼ 0.8 φ0, inconsistent with φc predicted by universal scaling theory for isolated chaotic quantum dots. © 1997 Academic Press Limited.