Anisotropic phonon thermal conductivity of YBa2 Cu3 O-7δ
Document Type
Article
Publication Date
12-1-1991
Department
Department of Physics
Abstract
Experimental data on the anisotropic thermal conductivity of single crystals of several high-Tc superconductors have recently been reported, but the existing theory of this quantity is based on an isotropic Debye model of the phonon spectrum. We have used a shell model which gives accurate frequencies for all phonons in the Brillouin zone to calculate the anisotropy of the defect-limited phonon thermal conductivity of YBa2Cu3O7-δ. We find that this anisotropy occurs because phonons propagating along the c-axis have lower velocities on the average, leading to a c-axis phonon thermal conductivity several times smaller than that in the ab-plane, in agreement with experiment.
Publication Title
Physica C: Superconductivity and its applications
Recommended Citation
Jaffe, J.,
Kulkarni, A.,
&
De Wette, F.
(1991).
Anisotropic phonon thermal conductivity of YBa2 Cu3 O-7δ.
Physica C: Superconductivity and its applications,
185-189(PART 2), 1405-1406.
http://doi.org/10.1016/0921-4534(91)91926-U
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/5735