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Pair-correlations and magnetic susceptibility of small Al-grains | | N.K. Kuzmenko
; V.M. Mikhajlov
; S.Frauendorf
; | | Date: |
1 Jul 1998 | | Journal: | J.Cluster Sci. 10 (1999) 195-225 | | Subject: | Mesoscopic Systems and Quantum Hall Effect; Atomic and Molecular Clusters | cond-mat.mes-hall nucl-th physics.atm-clus | | Abstract: | Paircorrelations and the magnetic susceptibility of electrons in a spherical cavity are studied both for grand canonical and the canonical ensemble. The coupling constant of the $BCS$ Hamiltonian is adjusted to experimental values of the gap parameter. The gap parameter is found to increase for small grains as a consequence of the pronounced shell structure in the spectrum of the spherical cavity. The sharp phase transition at $T_c$ is smeared out for the canonical ensemble. The strong paramagnetic susceptibility of the normal electrons in the cavity is reduced by the superconductivity, but it remains positive. | | Source: | arXiv, cond-mat/9807011 | | Services: | Forum | Review | PDF | Favorites | |
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