Superconductivity from repulsion: a variational view
Data(s) |
23/07/1999
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Resumo |
This letter presents a new class of variational wavefunctions for Fermi systems in any dimension. These wavefunctions introduce correlations between Cooper pairs in different momentum states and the relevant correlations can be computed analytically. At half filling we have a ground state with critical superconducting correlations, that causes negligible increase of the kinetic energy. We find large enhancements in a Cooper-pair correlation function caused purely by the interplay between the uncertainty principle, repulsion and the proximity of half filling. This is surprising since there is no accompanying signature in usual charge and spin response functions, and typifies a novel kind of many-body cooperative behaviour. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/38817/1/Superconductivity_from_repulsion.pdf Shastry, Sriram B (1999) Superconductivity from repulsion: a variational view. In: Journal of Physics A: Mathematical and General, 32 (29). L345-L352 . |
Publicador |
Institute of Physics |
Relação |
http://iopscience.iop.org/0305-4470/32/29/101 http://eprints.iisc.ernet.in/38817/ |
Palavras-Chave | #Others |
Tipo |
Editorials/Short Communications PeerReviewed |