Effect of long cyclic exchanges on the magnetic properties of bcc 3He

Ladir Cĝndido, G. Q. Hai, D. M. Ceperley

Research output: Contribution to journalArticlepeer-review

Abstract

Using path-integral Monte Carlo calculations, we have calculated ring exchange frequencies in the bcc phase of solid 3He for densities from melting to the highest stable density. We evaluate 42 different exchange frequencies from two atoms up to eight atoms and find their Grüneisen exponents. Using a fit to these frequencies, we calculate the contribution to the Curie-Weiss temperature, ΘCW, and upper critical magnetic field, B c2, for even longer exchanges using a lattice Monte Carlo procedure. We find that contributions from seven- and eight-particle exchanges make a significant contribution to ΘCW and Bc2 at melting density. Comparison with experimental data is given.

Original languageEnglish (US)
Article number064515
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number6
DOIs
StatePublished - Aug 23 2011

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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