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Author Sandvik, A. W. ♦ Scalapino, D. J.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ PHYSICS ♦ HIGH-TC SUPERCONDUCTORS ♦ MAGNETIC PROPERTIES ♦ YTTRIUM OXIDES ♦ BARIUM OXIDES ♦ COPPER OXIDES ♦ HEISENBERG MODEL ♦ ANTIFERROMAGNETISM ♦ MONTE CARLO METHOD ♦ TEMPERATURE DEPENDENCE ♦ SPIN ♦ STRUCTURE FACTORS ♦ NMR SPECTRA ♦ COUPLING
Abstract A two-layer Heisenberg antiferromagnet is studied as a model of the bilayer cuprate YBa{sub 2}Cu{sub 3}O{sub 6}. Quantum Monte Carlo results are presented for the temperature dependence of the spin correlation length, the static structure factor, the magnetic susceptibility, and the {sup 63}Cu NMR spin-echo decay rate 1/{ital T}{sub 2{ital G}}. As expected, when the ratio {ital J}{sub 2}/{ital J}{sub 1} of the intrabilayer and in-plane coupling strengths is small, increasing {ital J}{sub 2} pushes the system deeper inside the renormalized classical regime. Even for {ital J}{sub 2}/{ital J}{sub 1} as small as 0.1 the correlations are considerably enhanced at temperatures as high as {ital T}/{ital J}{sub 1}{approx_equal}0.4{endash}0.5. This has a significant effect on 1/{ital T}{sub 2{ital G}}, and it is suggested that measurements of this quantity at high temperatures can reveal the strength of the intrabilayer coupling in YBa{sub 2}Cu{sub 3}O{sub 6}. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-01-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 53
Issue Number 2


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