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Conductance peak distributions in quantum dots at finite temperature: Signatures of the charging energy

1998; American Physical Society; Volume: 58; Issue: 12 Linguagem: Inglês

10.1103/physrevb.58.r7524

1095-3795

Y. Alhassid, M. Gökçedağ, A. Douglas Stone,

Quantum-Dot Cellular Automata

We derive the finite temperature conductance peak distributions and peak-to-peak correlations for quantum dots in the Coulomb blockade regime assuming the validity of random-matrix theory. The distributions are universal, depending only on the symmetry class and the temperature measured in units of the mean level spacing, \ensuremath{\Delta}. When the temperature is comparable to \ensuremath{\Delta} several resonances contribute to the same conductance peak and we find significant deviations from the previously known $T\ensuremath{\ll}\ensuremath{\Delta}$ distributions. In contrast to the $T\ensuremath{\ll}\ensuremath{\Delta}$ case, these distributions show a strong signature of the charging energy and charge quantization on the dot.