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Subject Keyword PHYSICS ♦ KONDO EFFECT ♦ FIELD THEORIES ♦ SCALING ♦ FERMIONS ♦ BOSONS ♦ SPIN ♦ CONFORMAL INVARIANCE ♦ COUPLING ♦ MAGNETIC IMPURITIES
Abstract Yuval and Anderson{close_quote}s scaling analysis and Affleck and Ludwig{close_quote}s conformal field theory approach are applied to the {ital k} channel {ital spin} {ital anisotropic} Kondo model. Detailed comparisons with available Emery-Kivelson{close_quote}s (EK) Abelian bosonization approaches are made. The EK line is a natural property of the {ital k} channel Kondo model, although it can be mapped to free fermions only when {ital k}=1 or 2. The Wilson ratio is universal if {ital k}=1 or 2, but {ital not} universal if {ital k}{approx_gt}2. The leading low temperature correction to the electron resistivity is {ital not} affected by the spin anisotropy for {ital any} {ital k}. A new universal ratio for {ital k}{approx_gt}2 is compared with experiments. {copyright} {ital 1996 The American Physical Society.}
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-10-01
Publisher Place United States
Journal Physical Review Letters
Volume Number 77
Issue Number 15


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