Critical exponents in a quantum phase transition of an anisotropic 2D antiferromagnet

S. Moukouri

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

I use the two-step density-matrix renormalization group method to extract the critical exponents β and ν in the transition from a Néel Q=(π,π) phase to a magnetically disordered phase with a spin gap. I find that the exponent β computed from the magnetic side of the transition is consistent with that of the classical Heisenberg model, but not the exponent zν computed from the disordered side. This suggests a possible discrepancy with the classical behavior. I also show the contrast between integer and half-integer spin cases.

Original languageEnglish
Article number092410
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number9
DOIs
StatePublished - 18 Mar 2008
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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