## CMT 59

## Fermi-Liquid Theory for Unconventional Superconductors

**Author(s):**J. A. Sauls

**Comments:** 27 pages

**Journal:** Published in `*Strongly Correlated Electronic Materials: The Los Alamos Symposium 1993*'

(K.S. Bedell, Z. Wang, D.E. Meltzer, A.V. Balatsky, and E. Abrahams, eds.), pp. 106-132, Addison-Wesely, Reading, Mass., 1994 [ISBN 0-2-1-40930-5].
**Abstract:**
Fermi liquid theory is used to generate the Ginzburg-Landau free energy functionals for unconventional superconductors
belonging to various representations. The parameters defining the GL functional depend on Fermi surface anisotropy,
impurity scattering and the symmetry class of the pairing interaction. As applications I consider the basic models for
the superconducting phases of UPt_{3}. Two predictions of Fermi liquid theory for the two-dimensional representations
of the hexagonal symmetry group are (i) the zero-field equilibrium state exhibits spontaneously broken time-reversal
symmetry, and (ii) the gradient energies for the different 2D representations, although described by a similar GL
functionals, are particularly sensitive to the orbital symmetry of the pairing state and Fermi surface anisotropy.

Chapter:
[PDF]
[PS]

Eprint:
[PDF]