Re-entrant spin susceptibility of a superconducting grain

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dc.creatorDi Lorenzo, A.
dc.creatorFazio, Rosario
dc.creatorHekking, F. W. J.
dc.creatorFalci, G.
dc.creatorMastellone, A.
dc.creatorGiaquinta, G.
dc.date1999-11-25
dc.date.accessioned2026-07-07T06:31:28Z
dc.date.available2026-07-07T06:31:28Z
dc.descriptionWe study the spin susceptibility chi of a small, isolated superconducting grain. Due to the interplay between parity effects and pairing correlations, the dependence of chi on temperature T is qualitatively different from the standard BCS result valid in the bulk limit. If the number of electrons on the grain is odd, chi shows a re-entrant behavior as a function of temperature. This behavior persists even in the case of ultrasmall grains where the mean level spacing is much larger than the BCS gap. If the number of electrons is even, chi(T) is exponentially small at low temperatures.
dc.description9 pages, 3 figures. To be published in PRL
dc.identifierhttps://arxiv.org/abs/cond-mat/9911413
dc.identifierhttp://arxiv.org/abs/cond-mat/9911413
dc.identifierPhys. Rev. Letters, 84, 550 (2000).
dc.identifierdoi:10.1103/PhysRevLett.84.550
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/98614
dc.subjectStrongly Correlated Electrons
dc.subjectMesoscale and Nanoscale Physics
dc.titleRe-entrant spin susceptibility of a superconducting grain
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