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Mean Field Theory Applied to the High‐ T c Superconductivity
Author(s) -
Gaona S.,
Silva P. R.
Publication year - 1998
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199804)206:2<759::aid-pssb759>3.0.co;2-s
Subject(s) - superconductivity , condensed matter physics , ising model , mean field theory , physics , casimir effect , formalism (music) , high temperature superconductivity , metallic hydrogen , quantum mechanics , hydrogen , art , musical , visual arts
We propose an effective transverse Ising model (TIM) as a means to treat both metallic and high‐temperature superconductivity. The model is inspired by features which are present in the Gorter‐Casimir two‐fluid model of superconductivity, but it encompasses also the formalism used to treat the phase transitions in hydrogen‐bonded ferroelectrics. We treat the model in the random‐phase approximation, and as a consequence, the superconducting state reveals a structure of a gas of elementary excitations where the energy gap appears in a quite natural way.