Abstract
The properties of weakly coupled clean anisotropic (orthorhombic) superconductors with pure d and (d+s) pairing symmetry are considered. The authors derive analytical and universal results for generalized BCS-Muehlschlegel parameters like the zero temperature gap and the specific heat discontinuity at the transition even for the most general situation of (d+s) pairing symmetry. The properties of the gas of thermal excitations, the Bogoliubov quasiparticles, is studied through the temperature dependence of the quasiparticle entropy {sigma}{sub B}{sup 0}(T), the specific heat C{sub B}(T), the spin susceptibility {chi}{sub B}(T), and the quasiparticle contribution K{sub B}(T) to the electronic supercurrent response (magnetic field penetration depth). In particular they present analytical results for these quantities in the asymptotic low temperature limit T {r{underscore}arrow} 0. The experimental relevance of these results for hole-doped cuprate superconductors with orthorhombic crystal symmetry is discussed.
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