Universal fluctuations of Coulomb blockade peaks in quantum dots

✍ Scribed by S.R. Patel; S.M. Cronenwett; A.G. Huibers; M. Switkes; J.A. Folk; C.M. Marcus; K. Campman; A.C. Gossard

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 189 KB
• Volume: 21
• Category: Article
• ISSN: 0749-6036
• DOI: 10.1006/spmi.1996.0139

✦ Synopsis

We describe recent measurements of the statistics and parametric correlations of Coulomb blockade peak heights in shape-deformable GaAs/Al x Ga 1-x As quantum dots. We find good agreement between the measured distributions of peak heights and probability distributions predicted by random matrix theory for both B = 0 and B = 0. The measured magnetic flux correlation length ϕ c is of the order of but less than one flux quantum through the dot, ϕ c ∼ 0.8 ϕ 0 , inconsistent with ϕ c predicted by universal scaling theory for isolated chaotic quantum dots.