Kosterlitz-thouless and magnetic transition temperatures in layered magnets with a weak easy-plane anisotropy

V. Irkhin, A. A. Katanin

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

The two-dimensional (2D) Heisenberg magnet with a weak easy-plane anisotropy is considered. A renormalization-group analysis in this model is performed for both quantum and classical cases. A crossover from the Heisenberg to 2D (Formula presented) model is discussed. The magnetic transition owing to the interlayer coupling is considered. Analytical results for the Kosterlitz-Thouless and Curie (Néel) temperatures are derived by taking into account two-loop corrections. The results are compared with experimental data, e.g., on (Formula presented) and turn out to provide a quantitative description, unlike the standard one-loop results.

Original languageEnglish
Pages (from-to)2990-2993
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number5
DOIs
Publication statusPublished - 1999
Externally publishedYes

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