Signatures of Spin Pairing in Chaotic Quantum Dots

DOI to cite this document:: 10.5283/epub.11172

Lüscher, S. ; Heinzel, Thomas

; Ensslin, Klaus ; Wegscheider, Werner ; Bichler, Max

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Date of publication of this fulltext: 30 Nov 2009 13:40

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Abstract

Coulomb blockade resonances are measured in a GaAs quantum dot in which both shape deformations and interactions are small. The parametric evolution of the Coulomb blockade peaks shows a pronounced pair correlation in both position and amplitude, which is interpreted as spin pairing. As a consequence, the nearest-neighbor distribution of peak spacings can be well approximated by a modified ...