Immediately noting the correctness of Schrieffer’s variational wave function, Bardeen, with his deep knowledge of the phenomenon (Cooper LN, Feldman D (eds) BCS: 50 years. World Scientific, Hackensack, 2011), teamed up with Cooper and Schrieffer to construct a microscopic theory of superconductivity. The BCS theory was thereby developed quite rapidly to bring remarkable agreement between theory and various experiments on single-element superconductors. This is because in these superconductors the relevant attraction in Cooper-pair condensation is weak, making the mean-field description appropriate. In this chapter, we derive the main thermodynamic results of the BCS theory for homogeneous s-wave superconductors based on the formalism developed in the previous chapter.
KeywordsHeat Capacity Fermi Surface Cutoff Energy Spontaneous Symmetry Breaking Landau Theory
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