Mesoscopic Fluctuations of Elastic Cotunneling in Coulomb Blockaded Quantum Dots
| Autor: | S. M. Cronenwett, S. R. Patel, Charles Marcus, Arthur C. Gossard, K. L. Campman |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Physics
Mesoscopic physics Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Quantum dot Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Coulomb General Physics and Astronomy Conductance FOS: Physical sciences Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Quantum tunnelling Magnetic field |
| DOI: | 10.48550/arxiv.cond-mat/9707274 |
| Popis: | 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. Comment: 9 pages, postscript (includes 4 figs). To be published in PRL |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|