BCS theory of nodal superconductors

Details BCS theory of nodal superconductors BCS theory of nodal superconductors

2005-01-19

arxiv.org/abs/cond-mat/0501463v1

Physics

Condensed Matter

Superconductivity

31 pages, 33 figures

Scientific paper

10.1063/1.2080347

This course has a dual purpose. First we review the successes of the weak-coupling BCS theory in describing new classes of superconductors discovered since 1979. They include the heavy-fermion superconductors, high-Tc cuprate superconductors, organic superconductors, Sr2RuO4, etc. Second, we present the quasiclassical approximation introduced by Volovik, which we extend to describe the thermodynamics and the thermal conductivity of the vortex state in nodal superconductors. This approach provides the most powerful tool to identify the symmetry of the energy gap function Delta(k) in these new superconductors.

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