TY - JOUR
T1 - Effect of long cyclic exchanges on the magnetic properties of bcc 3He
AU - Cĝndido, Ladir
AU - Hai, G. Q.
AU - Ceperley, D. M.
PY - 2011/8/23
Y1 - 2011/8/23
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.84.064515
DO - 10.1103/PhysRevB.84.064515
M3 - Article
AN - SCOPUS:80052352262
SN - 1098-0121
VL - 84
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 6
M1 - 064515
ER -