Quantum spin glass and the dipolar interaction

Moshe Schechter, Nicolas Laflorencie

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

Anisotropic dipolar systems are considered. Such systems in an external magnetic field are expected to be a good experimental realization of the transverse field Ising model. With random interactions, this model yields a spin glass to paramagnet phase transition as a function of the transverse field. We show that the off-diagonal dipolar interaction, although effectively reduced, induces a finite correlation length and thus destroys the spin-glass order at any finite transverse field. We thus explain the behavior of the nonlinear susceptibility in the experiments on LiHoxY1-xF4, and argue that a crossover to the paramagnetic phase, and not quantum criticality, is observed.

Original languageEnglish
Article number137204
JournalPhysical Review Letters
Volume97
Issue number13
DOIs
StatePublished - 9 Oct 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (all)

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