Anisotropic thermal conductivity ofTl2Ba2CaCu2O8andYBa2Cu3O7single crystals: Anomaly in both in-plane and out-of-plane directions

1 December 1991

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 44 (22) , 12571-12574
https://doi.org/10.1103/physrevb.44.12571

Abstract

The anisotropic thermal conductivity of

{Tl}_{2}

{Ba}_{2}

{CaCu}_{2}

O_{8}

and

{YBa}_{2}

{Cu}_{3}

O_{7}

single crystals have been measured. In contrast to some earlier measurements on

{YBa}_{2}

{Cu}_{3}

O_{7}

, we found both an in-plane and an out-of-plane anomaly for these two compounds. We argue that phonon-phonon scattering may also play some role in the phenomenon.

Keywords

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