Ahn, Kang-Hun and Richter, Klaus and Lee, In-Ho (1999) Addition Spectra of Chaotic Quantum Dots: Interplay between Interactions and Geometry. Physical Review Letters 83 (20), pp. 4144-4147.
Download (557kB) - Repository staff only
Other URL: http://link.aps.org/abstract/PRL/v83/p4144
We investigate the influence of interactions and geometry on ground states of clean chaotic quantum dots using the self-consistent Hartree-Fock method. We find two distinct regimes of interaction strength: While capacitive energy fluctuations follow approximately a random matrix prediction for weak interactions, there is a crossover to a regime where is strongly enhanced and scales roughly with interaction strength. This enhancement is related to the rearrangement of charges into ordered states near the quantum dot edge. This effect is nonuniversal depending on the shape and the size of the dot. It may provide insight into recent experiments on statistics of Coulomb blockade peak spacings.
|Institutions:||Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||20 Jul 2011 20:57|