A quantum dot in the fractional quantum Hall regime

✍ Scribed by Jari M. Kinaret

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 317 KB
• Volume: 189
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(93)90155-y

✦ Synopsis

In this article we discuss conductance through a quantum dot in the fractional quantum Hall regime. We argue that in the intermediate temperature regime (F~ .~ kT ~ A) many-body coherence strongly suppresses the conductance well below the integer regime values. In particular, we find that in the u = 1/q regime the heights of conductance peaks decrease as N ~ ~ as a function of the number of electrons in the dot. At filling factor u = 1 -l/q we suggest that there are two types of peaks with different scaling behavior. In this case the decay exponents depend on the mixing between the edge branches. We use a simple electrostatic model to estimate this mixing and the corresponding decay exponents. After the pioneering work by Meirav et al. [1] a great deal of interest has focused on studying the effects of Coulomb blockade in small semiconductor structures. The physics of Coulomb