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Author McKenzie, R. H.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ PHASE TRANSFORMATIONS ♦ QUANTIZATION ♦ RANDOMNESS ♦ SPIN ORIENTATION ♦ CHAINS ♦ DIRAC EQUATION ♦ RENORMALIZATION ♦ ISING MODEL ♦ SPIN SYSTEMS ♦ CRITICAL EXPONENTS
Abstract The effect of disorder on the quantum phase transitions induced by a transverse field, anisotropy, and dimerization in {ital XY} spin chains is investigated. The low-energy behavior near the critical point is described by a Dirac-type equation for which an exact analytic treatment is possible. Results obtained for the dynamical critical exponent, the specific heat, and the transverse susceptibility agree with results recently obtained using a real space renormalization group decimation technique. A nonzero transverse field changes the universality class of the anisotropy transition. {copyright} {ital 1996 The American Physical Society.}
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-12-01
Publisher Place United States
Journal Physical Review Letters
Volume Number 77
Issue Number 23


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