Cooper pairs in a two-orbital superconductor : Bands filling effect on pair sizes

• The two-orbital superconducting state is modeled by on-site intra-orbital negative-U Hubbard correlations together with inter-orbital pair-transfer interactions. The influence of bands filling on the temperature dependencies of the sizes of Cooper pairs in different orbitals is analyzed. It is found that the sizes exhibit unconventionally strong variation in the temperature scale for occupations favouring interband proximity effect.

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NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

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