Pf. Henning et al., THERMAL-CONDUCTIVITY OF ZN, PR AND TB DOPED YBCO SINGLE-CRYSTALS - THEORY AND EXPERIMENT, Journal of superconductivity, 8(4), 1995, pp. 453-456
The thermal conductivity K(T) vs temperature has been measured for (Y,
Pr)Ba2Cu3O7, (Y,Tb)Ba2Cu3O7 and YBa2(Cu,Zn)(3)O-7 single crystals from
10 less than or equal to T less than or equal to 280K. For YBa2Cu3O7
(YBCO), a strong enhancement in K(T) is observed for T less than or eq
ual to T-c with a peak in K(T) at approximately T approximate to T-c/2
with a sharp change in slope of K(T) at T-c. These results are simila
r to those reported previously. For the selectively doped YBCO, the pe
ak in K(T) is shifted to lower temperatures and occurs at T approximat
e to 20K independent of T-c and the impurity concentration. In additio
n, the sharp change in slope of K(T) at T-c is not apparent for the do
ped crystals. These results are discussed along with a theoretical mod
el for electronic conduction including both impurity and inelastic sca
ttering from spin fluctuations.