Influence of various scattering mechanisms on thermal conductivity of doped Pr1.3–xLa0.7CexCuO4 high-temperature superconductor
Akanksha Parmar1, A. K. Dimri2, and M. K. Bera1
1Department of Physics, Maharishi Markandeshwar (Deemed to be University), Mullana Ambala 133207, Haryana, India
2Department of Physics, Maharaj Singh College, Sa-haranpur 247001, Uttar Pradesh, India
Received January 31, 2022, revised March 15, 2022, published online May 20, 2022
A theoretical analysis of thermal conductivity of high-temperature superconductor cuprates, Pr1.3–xLa0.7CexCuO4 (PLCCO), has been successfully investigated. In this formulation, the idea of relaxation times and other scattering processes has been developed from frequency (energy) line widths using a quantum dynamical method. The major emphasis of this study is on the influence of phonon-dopant atom scattering on the thermal conductivity of Ce-doped PLCCO, as well as other prominent scattering processes such as electron-phonon, cubic and quartic anharmonic phonon, cubic and quartic phonon interference, and so on. The proposed theory has achieved a satisfactory agreement between theory and experiment.
Key words:  high-temperature superconductors, lattice thermal conductivity, relaxation rate, Ce-doped PLCCO, phonon scattering.