MESOSCOPIC FLUCTUATIONS OF ELASTIC CONTUNNELING IN COULOMB BLOCKADED QUANTUM DOTS

Authors
CRONENWETT SM PATEL SR MARCUS CM CAMPMAN K GOSSARD AC
Citation
Sm. Cronenwett et al., MESOSCOPIC FLUCTUATIONS OF ELASTIC CONTUNNELING IN COULOMB BLOCKADED QUANTUM DOTS, Physical review letters, 79(12), 1997, pp. 2312-2315
Citations number
33
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
79
Issue
12
Year of publication
1997
Pages
2312 - 2315
Database
ISI
SICI code
0031-9007(1997)79:12<2312:MFOECI>2.0.ZU;2-B
Abstract
We report measurements of mesoscopic fluctuations of elastic cotunneli ng in Coulomb blockaded quantum dots. Unlike resonant tunneling on Cou lomb peaks, cotunneling in the valleys is sensitive to charging effect s. We observe a larger magnetic field scale for the cotunneling (valle y) 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 conduc tance correlation decreases quickly.