Interplay between pairing and exchange in small metallic dots
arXiv:cond-mat/0208259 · doi:10.1103/PhysRevB.67.132501
Abstract
We study the effects of the mesoscopic fluctuations on the competition between exchange and pairing interactions in ultrasmall metallic dots when the mean level spacing is comparable or larger than the BCS pairing energy. Due to mesoscopic fluctuations, the probability to have a non-zero spin ground state may be non-vanishing and shows universal features related to both level statistics and interaction. Sample to sample fluctuations of the renormalized pairing are enlightened.
10 pages, 5 figures
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Cited by in corpus (8)
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- Thermodynamics of ultrasmall metallic grains in the presence of pairing and exchange correlations: Mesoscopic fluctuations
- Effect of a Zeeman field on the superconductor-ferromagnet transition in metallic grains
- Mesoscopic Stoner instability in metallic nanoparticles revealed by shot noise
- The coexistence of superconductivity and ferromagnetism in nano-scale metallic grains
- Mesoscopic interplay of superconductivity and ferromagnetism in ultra-small metallic grains