Nature of the anomalous thermal conductivity of high-Tc superconductors
Pashitskii E. A., Pentegov V. I.
The anomalous increase in the thermal conductivity below the superconducting transition temperature Tc of high-J(. superconductors may be due to the existence of weakly damped collective electron excitations of a Bose type with an acoustic dispersion relation (acoustic plasmons) inside the superconducting gap 2Δ( Τ). © 1994 American Institute of Physics.