Thermal transport in the cuprates: changes with doping across the phase diagram

Joshua L. Cohn

doi:10.1117/12.250229

5 July 1996 Thermal transport in the cuprates: changes with doping across the phase diagram

Joshua L. Cohn

Proceedings Volume 2697, Oxide Superconductor Physics and Nano-Engineering II; (1996) https://doi.org/10.1117/12.250229
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

An overview of recent developments in the understanding of thermal conduction in the cuprates is presented. Anomalous phonon damping underlies an unusual temperature dependence of the in-plane thermal conductivity for the insulating phase of some materials. This damping is sensitive to light oxygen doping in YBa₂Cu₃O_6+x (YBCO), is possibly related to local structural distortions, and may persist in superconducting compositions. New systematics for the superconducting-state enhancement of K_ab are discussed. For YBCO the oxygen-doping dependence of the enhancement correlates with that of the pari density as determined by specific heat jumps. The large enhancements observed for fully-oxygenated specimens are attributed to pair condensation on the CuO chains. The implications of this finding and its possible connection with the emergence of the normal-state pseudogap are examined.

Citation Download Citation

Joshua L. Cohn "Thermal transport in the cuprates: changes with doping across the phase diagram", Proc. SPIE 2697, Oxide Superconductor Physics and Nano-Engineering II, (5 July 1996); https://doi.org/10.1117/12.250229

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