Hall angle evidence for the superclean regime in 60 K YBa2Cu3O6+y

J. M. Harris, Y. F. Yan, O. K.C. Tsui, Y. Matsuda, Nai Phuan Ong

Research output: Contribution to journalArticle

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Abstract

A type-II superconductor is in the "superclean" regime when the spacing ω0 between energy levels in the vortex core greatly exceeds the width of the levels τ. A key signature of this regime is a flux-flow Hall angle θH that approaches ±π2. We report the first observation of this trend in a high-temperature superconductor. In "60 K" YBa2Cu3O6+y crystals, |tanθH| is observed to increase dramatically when the temperature decreases below ∼40 K, attaining the magnitude 0.85 at 15 K. By extrapolation, we estimate that ω0τ increases to 2-3 at 3 K. Below 40 K, the Hall conductivity σxy is negative and decreases as 1H at high fields.

Original languageEnglish (US)
Pages (from-to)1711-1714
Number of pages4
JournalPhysical review letters
Volume73
Issue number12
DOIs
StatePublished - Jan 1 1994

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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