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Parity and finite size effects in the thermodynamics of small superconductors

✍ Scribed by R. Rossignoli; J.P. Zagorodny; N. Canosa

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
196 KB
Volume
258
Category
Article
ISSN
0375-9601

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✦ Synopsis

The effects of thermal and quantal gap fluctuations in small superconductors are investigated by means of the static path plus random phase approximation to the partition function, which is implemented in an ensemble with fixed particle number Ε½ . parity NP . The transitions of the NP projected BCS approximation, examined in detail, become increasingly washed out as the size decreases. Moreover, non-vanishing pairing correlations are seen to subsist in small systems where no ordinary superconducting solution exists at the BCS level. Comparison with exact canonical results obtained for a very small size confirm the predictions obtained with the present method.

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## Abstract The pelvis is a sexually dimorphic structure and although the causes of that dimorphism have long been studied, relatively little is known regarding the effects of partuitive events on the magnitude of that dimorphism. Here, we use a sample of __Mus musculus domesticus__ to contrast dim