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Article Dans Une Revue Superconductor Science and Technology Année : 2015

Pair–pair interactions as a mechanism for high-Tc superconductivity

Résumé

The mutual interaction between Cooper pairs is proposed as a mechanism for the superconducting state. Above Tc, pre-existing but fluctuating Cooper pairs give rise to the unconventional pseudogap (PG) state, well-characterized by experiment. At the critical temperature, the pair–pair interaction induces a Bose-like condensation of these preformed pairs leading to the superconducting (SC) state. Below Tc, both the condensation energy and the pair– pair interaction β are proportional to the condensate density Noc(T), while the usual Fermi-level spectral gap Dp is independent of temperature. The new order parameter b (T), can be followed as a function of temperature, carrier concentration and disorder—i.e. the phase diagrams. The complexity of the cuprates, revealed by the large number of parameters, is a consequence of the coupling of quasiparticles to Cooper-pair excitations. The latter interpretation is strongly supported by the observed quasiparticle spectral function

Dates et versions

hal-01208321 , version 1 (02-10-2015)

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William Sacks, Alain Mauger, Yves Noat. Pair–pair interactions as a mechanism for high-Tc superconductivity. Superconductor Science and Technology, 2015, 28 (10), pp.105014. ⟨10.1088/0953-2048/28/10/105014⟩. ⟨hal-01208321⟩
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