Abstract
We consider a distribution of conductance fluctuations in quantum dots with single channel leads and continuous level spectra, and demonstrate that it has a distinctly non-Gaussian shape and strong dependence on time-reversal symmetry, in contrast to an almost Gaussian distribution of conductances in a disordered metallic sample connected to a reservoir by broad multichannel leads. In the absence of time-reversal symmetry, our results obtained within the diagrammatic approach coincide with those derived within non-perturbative techniques. In addition, we show that the distribution has log-normal tails for weak disorder, similar to the case of broad leads, and that it becomes almost log-normal as the amount of disorder is increased towards the Anderson transition.
Original language | English |
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Pages (from-to) | 6719-6728 |
Number of pages | 10 |
Journal | Journal of Physics: Condensed Matter |
Volume | 8 |
Issue number | 36 |
DOIs | |
Publication status | Published - 2 Sept 1996 |