Analysis of Thermodynamic and Transport Properties of La(2-x)M(x)CuO4 and YBa2CuO(7 - delta) Superconductors

摘要

Anisotropic Ginzburg-landau theory for coupled s-wave and d-wave order parameters is used to analyze the unique thermodynamic and transport properties of the new La2-x(Ba,Sr)xCu04 and YBa2Cu307-delta superconductors. This simple phenomenological approach is used to explain the prevalence of the large Sommerfeld coefficients of the specific heat, the existence of multiple specific heat anomalies, the ultrasonic attenuation peak, and model the anisotropic critical field data as observed in oriented samples.