Wr. Studenmund et al., SYMMETRY OF DIFFERENTIAL OPTICAL-RESPONSES OF NORMAL AND SUPERCONDUCTING PHASES IN SINGLE-CRYSTAL YBCO, Journal of physics and chemistry of solids, 56(12), 1995, pp. 1843-1844
We measured differential optical reflectivity (DOR) of YBCO single dom
ains. DOR measurements reject the temperature independent bulk reflect
ivity and reveal dR/dT. These measurements detect the superconducting
transition, and reveal specific anisotropy associated with high-T-c su
perconductivity.