Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2001-06-22
Phys. Rev. B 65, 054416 (2002)
Physics
Condensed Matter
Statistical Mechanics
10 pages (Revtex) + 8 figures (in 2 postscript files)
Scientific paper
10.1103/PhysRevB.65.054416
The ground state of the antiferromagnetic XY model with a kagome lattice is characterized by a well developed accidental degeneracy. As a consequence the phase transition in this system consists in unbinding of pairs of fractional vortices. Addition of the next-to-nearest neighbors (NNN) interaction leads to stabilization of the long-range order in chirality (staggered chirality). We show that the phase transition, related with destruction of this long-range order, can happen as a separate phase transition below the temperature of the fractional vortex pairs unbinding only if the NNN coupling is extremely weak, and find how the temperature of this transition depends on coupling constants. We also demonstarte that the antiferromagnetic ordering of chiralities and, accordingly, the presence of the second phase transition are induced by the free energy of spin wave fluctuations even in absence of the NNN coupling.
No associations
LandOfFree
Phase transitions in the antiferromagnetic XY model with a kagome lattice 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 Phase transitions in the antiferromagnetic XY model with a kagome lattice, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase transitions in the antiferromagnetic XY model with a kagome lattice will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-435933