Conductance Peak Distributions in Quantum Dots at Finite Temperature: Signatures of the Charging Energy

Details Conductance Peak Distributions in Quantum Dots at Finite Temperature: Signatures of the Charging Energy Conductance Peak Distributions in Quantum Dots at Finite Temperature: Signatures of the Charging Energy

1998-07-31

arxiv.org/abs/cond-mat/9807413v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, 3 Postscript figures included, RevTex, to appear as a Rapid Communication in Physical Review B

Scientific paper

10.1103/PhysRevB.58.R7524

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, $\Delta$. When the temperature is comparable to $\Delta$ several resonances contribute to the same conductance peak and we find significant deviations from the previously known $T \ll \Delta$ distributions. In contrast to the $T \ll \Delta$ case, these distributions show a strong signature of the charging energy and charge quantization on the dot.

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