Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-08-04
Phys. Rev. B 84 (2011) 064431
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 5 figures, accepted for publication in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.84.064431
We propose an efficient method to identify the degree of frustration in quasi-2D antiferromagnets described by the J_1-J_2 Heisenberg model. The frustration ratio J_2/J_1 is usually obtained from analysis of susceptibility, specific heat and saturation field. We show that the non-monotonic field dependence of the staggered moment caused by the suppression of quantum fluctuations in a field depends strongly on the frustration ratio. This gives a powerful criterion to determine J_2/J_1 using a combination of exact diagonalization (ED) method for finite clusters and spin wave analysis. We apply this method to the quasi-2D compound Cu(pz)_2(ClO_4)_2 and show that it leads to an intermediate ratio J_2/J_1 ~ 0.2 for the frustration. We also explain the observed anomalous increase of transition temperature in applied fields as an effect of reduced quantum fluctuations.
Schmidt Burkhard
Siahatgar Mohammad
Thalmeier Peter
No associations
LandOfFree
Staggered moment dependence on field-tuned quantum fluctuations in 2D frustrated antiferromagnets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Staggered moment dependence on field-tuned quantum fluctuations in 2D frustrated antiferromagnets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Staggered moment dependence on field-tuned quantum fluctuations in 2D frustrated antiferromagnets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-14466