Determining the wiedemann-franz ratio from the thermal hall conductivity: Application to Cu and YBa2Cu3O6.95

Y. Zhang, Nai Phuan Ong, Z. A. Xu, K. Krishana, R. Gagnon, L. Taillefer

Research output: Contribution to journalArticle

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Abstract

The Wiedemann-Franz (WF) ratio compares the thermal and electrical conductivities in a metal. We describe a new way to determine its value, based on the thermal Hall conductivity. The technique is applied to copper and to untwinned YBaCuO. In the latter, we uncover a T-linear dependence and suppression of the Hall-channel WF ratio. We discuss the implications of this suppression. The general suppression of the WF ratio in systems with predominant electron-electron scattering is discussed.

Original languageEnglish (US)
Pages (from-to)2219-2222
Number of pages4
JournalPhysical review letters
Volume84
Issue number10
DOIs
StatePublished - Jan 1 2000

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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