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A correlated pair of fermions formed by an effective attractive interaction near a Fermi surface. In conventional superconductors the attraction is commonly phonon-mediated, but pairing mechanisms and symmetry can differ in unconventional systems.
wp-physics-cooper-pairaps-cooper-pairsaps-bcs-theorymit-theory-of-solidsEach relation below ends at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
In an electronic superconductor, a Cooper pair is built from two correlated fermionic electron quasiparticle states near the Fermi surface; it is not a new elementary particle or ordinarily a tightly localized molecule.
The source is a material constituent, structural component, or underlying quantum field whose excitation realizes the target physical system or particle. The edge label and detail must distinguish composition from field excitation; neither implies a simple classical sum of parts.
wp-physics-electronwp-physics-cooper-pairaps-cooper-pairsaps-bcs-theoryEach relation below starts at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Conventional superconductivity is collective order of strongly overlapping Cooper pairs; a collection of isolated pairs without phase coherence is not by itself a superconducting state.
The target is a collective, organizational, or scale-dependent phenomenon of the source constituents and interactions; it is not a mere list or classical sum of constituents.
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