Spin-wave theory at constant order parameter

Details Spin-wave theory at constant order parameter Spin-wave theory at constant order parameter

2002-10-25

arxiv.org/abs/cond-mat/0210578v2

Phys. Rev. B 67, 104427 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 3 figures; published version

Scientific paper

10.1103/PhysRevB.67.104427

We derive the low-temperature properties of spin-S quantum Heisenberg magnets from the Gibbs free energy G(M) for fixed order parameter M. Assuming that the low-lying elementary excitations of the system are renormalized spin waves, we show that a straightforward 1/S expansion of G(M) yields qualitatively correct results for the low-temperature thermodynamics, even in the absence of long-range magnetic order. We explicitly calculate the two-loop correction to the susceptibility of the ferromagnetic Heisenberg chain and show that it quantitatively modifies the mean-field result.

Affiliated with

Also associated with

No associations

Rating

Spin-wave theory at constant order parameter 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 Spin-wave theory at constant order parameter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin-wave theory at constant order parameter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-614310