Effective spin-wave action for ordered Heisenberg antiferromagnets in a magnetic field

Details Effective spin-wave action for ordered Heisenberg antiferromagnets in a magnetic field Effective spin-wave action for ordered Heisenberg antiferromagnets in a magnetic field

2005-11-29

arxiv.org/abs/cond-mat/0511706v1

Comptes Rendus Chimie 10, 60 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 1 eps figure; proceedings of the symposium on "Spin- and charge-correlations in molecule-based materials", October 20

Scientific paper

10.1016/j.crci.2006.06.008

We derive the effective long-wavelength Euclidean action for the antiferromagnetic spin-waves of ordered quantum antiferromagnets subject to a uniform magnetic field. We point out that the magnetic field dependence of the spin-wave dispersion predicted by the usual O(3)-quantum nonlinear sigma model disagrees with spin-wave theory. We argue that the nonlinear sigma model does not take into account all relevant spin-wave interactions and derive a modified effective action for the long-wavelength spin-waves which contains an additional quartic interaction. At zero temperature the corresponding vertex is relevant in the renormalization group sense below three dimensions.

Affiliated with

Also associated with

No associations

Rating

Effective spin-wave action for ordered Heisenberg antiferromagnets in a magnetic field 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 Effective spin-wave action for ordered Heisenberg antiferromagnets in a magnetic field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effective spin-wave action for ordered Heisenberg antiferromagnets in a magnetic field will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-716188