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Calculation of the Normal‐State Thermal Conductivity of the Lattice for High‐ T c Superconductors
Author(s) -
Schiller W.,
Weschke K.
Publication year - 1990
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221610230
Subject(s) - anharmonicity , superconductivity , condensed matter physics , lattice vibration , lattice (music) , thermal conductivity , scattering , inverse , physics , materials science , thermal , electron , chemistry , thermodynamics , quantum mechanics , phonon , mathematics , geometry , acoustics
Starting from the method of inverse linear response theory the thermal conductivity of the lattice is calculated for the anharmonic model of high‐ T c superconductors with structurally unstable lattices. This model describes the interaction between strong anharmonic ion vibrations and the electron system. The contribution of this interaction and a contribution due to the structure of the anharmonic model determine the properties of the lattice thermal conductivity. The influence of both scattering mechanisms on the temperature behaviour in the normal‐conducting phase is considered. Results for different parameters of the anharmonic model are discussed and compared with experimental investigations on YBaCuO compounds.