Small tip angle NMR as a probe of electron-mediated nuclear spin-spin couplings in YBa2Cu3O7

C. H. Pennington, S. Yu, K. R. Gorny, M. J. Buoni, W. L. Hults, J. L. Smith

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We develop the theory and application of small tip angle NMR techniques that can be used to measure couplings between nuclear spins and multiple neighboring spins. We employ the techniques to measure indirect (electron-mediated) nuclear spin-spin couplings between neighboring 63,65Cu and 17O nuclear spins in the high-temperature superconductor YBa2Cu3O7. Predictions for the values of these couplings can be obtained from the existing phenomenological models of electronic spin susceptibility x(q,ω) and hyperfine couplings that have been used in attempts to understand the wide body of YBa2Cu3O7 NMR data gathered to date. We find that the measured couplings are incompatible with these models.

Original languageEnglish (US)
Article number054513
Pages (from-to)545131-5451313
Number of pages4906183
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number5
DOIs
StatePublished - Jan 1 2001

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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