DEPHASING IN OPEN QUANTUM DOTS

Authors
HUIBERS AG SWITKES M MARCUS CM CAMPMAN K GOSSARD AC
Citation
Ag. Huibers et al., DEPHASING IN OPEN QUANTUM DOTS, Physical review letters, 81(1), 1998, pp. 200-203
Citations number
36
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
81
Issue
1
Year of publication
1998
Pages
200 - 203
Database
ISI
SICI code
0031-9007(1998)81:1<200:DIOQD>2.0.ZU;2-J
Abstract
Shape-averaged magnetoconductance (weak localization) is used for the first time to obtain the electron phase coherence time tau(phi) in ope n ballistic GaAs quantum dots. Values for tau(phi) in the range of tem perature T from 0.34 to 4 K are found to be independent of dot area, a nd are not consistent with the tau(phi) proportional to T-2 behavior e xpected for isolated dots. Surprisingly, tau(phi)(T) agrees quantitati vely with the predicted dephasing time for disordered two-dimensional electron systems.