1997/07/27 by S. M. Cronenwett, S. R. Patel, C. M. Marcus +3 · 3 citations
Physics and Astronomy · #Nonlinear Photonic Systems #Quantum chaos and dynamical systems #Scientific Research and Discoveries #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.79.2312
published as S.M. Cronenwett et al., PRL 79, 2312 (1997) · 9 pages, postscript (includes 4 figs). To be published in PRL
arxiv created 1997/07/27 · openalex publication_date 1997/09/22 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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\phantom\rule0ex0ex=\phantom\rule0ex0ex0) in valleys. Cotunneling fluctuations remain correlated over several valleys while peak conductance correlation decreases quickly.