1996/06/01 by J. A. Sauls, D. Rainer
Materials Science · Physics and Astronomy · #Anisotropy #Cuprate #Fermion #Impurity #Iron-based superconductors research #Pairing #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Superconductivity #Symmetry (geometry) #cond-mat.supr-con
paper · pdf · doi:10.1007/bf02548114
published as Czech. J. Phys. 46, pp. 3089-3096 (1996) · 8 pages in a LaTex (3.0) file plus 5 Figures in PostScript. To appear in the Proceedings of the XXI International Conference on Low Temperature Physics held in Prague, 8-14 August 1996
openalex publication_date 1996/06/01 · arxiv created 1996/10/05 · arxiv updated 2010/11/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The Fermi-liquid theory of superconductivity is applicable to a broad range of systems that are candidates for unconventional pairing. Fundamental differences between unconventional and conventional anisotropic superconductors are illustrated by the unique effects that impurities have on the low-temperature transport properties of unconventional superconductors. For special classes of unconventional superconductors the low-temperature transport coefficients are \it universal, i.e. independent of the impurity concentration and scattering phase shift. The existence of a universal limit depends on the symmetry of the order parameter and is achieved at low temperatures kB T ≪ γ≪ Δ0, where γ is the bandwidth of the impurity induced Andreev bound states. In the case of UPt3 thermal conductivity measurements favor an E1g or E2u ground state. Measurements at ultra-low temperatures should distinguish different pairing states.