Mesoscopic Fluctuations of Elastic Cotunneling in Coulomb Blockaded Quantum Dots

Details Mesoscopic Fluctuations of Elastic Cotunneling in Coulomb Blockaded Quantum Dots Mesoscopic Fluctuations of Elastic Cotunneling in Coulomb Blockaded Quantum Dots

1997-07-27

arxiv.org/abs/cond-mat/9707274v1

S.M. Cronenwett et al., PRL 79, 2312 (1997)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, postscript (includes 4 figs). To be published in PRL

Scientific paper

10.1103/PhysRevLett.79.2312

We report measurements of mesoscopic fluctuations of elastic cotunneling in Coulomb blockaded quantum dots. Unlike resonant tunneling on Coulomb peaks, cotunneling in the valleys is sensitive to charging effects. We observe a larger magnetic field scale for the cotunneling (valley) fluctuations compared to the peaks, as well as an absence of "weak localization" (reduced conductance at B = 0) in valleys. Cotunneling fluctuations remain correlated over several valleys while peak conductance correlations decreases quickly.

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