Gradient free energy and intrinsic angular momentum in unconventional superconductors
- 1 September 1989
- journal article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 40 (7), 5144-5146
- https://doi.org/10.1103/physrevb.40.5144
Abstract
We discuss the Ginzburg-Landau gradient-free-energy density for unconventional superconductors. In particular, we consider a certain term related to the intrinsic angular momentum of the Cooper pairs. The coefficient of this term vanishes in weak-coupling theory for a pure metal; as pointed out by Gorkov, it can acquire a nonzero value when impurity scattering is present. We display calculations of this coefficient for both even- and odd-parity gaps using the quasiclassical theory of superconductivity.Keywords
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