Edge and impurity response in two-dimensional quantum antiferromagnets

Details Edge and impurity response in two-dimensional quantum antiferromagnets Edge and impurity response in two-dimensional quantum antiferromagnets

2008-08-04

arxiv.org/abs/0808.0496v1

Physical Review B 78, 174410 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

25 pages, 6 figures

Scientific paper

10.1103/PhysRevB.78.174410

Motivated by recent Monte-Carlo simulations of Hoglund and Sandvik (arXiv:0808.0408), we study edge response in square lattice quantum antiferromagnets. We use the O(3) non-linear sigma-model to compute the decay asymptotics of the staggered magnetization, energy density and local magnetic susceptibility away from the edge. We find that the total edge susceptibility is negative and diverges logarithmically as the temperature vanishes. We confirm the predictions of the continuum theory by performing a 1/S expansion of the microscopic Heisenberg model with the edge. We propose a qualitative explanation of the edge dimerization seen in Monte-Carlo simulations by a theory of valence-bond-solid correlations in the Neel state. We also discuss the extension of the latter theory to the response of a single non-magnetic impurity, and its connection to the theory of the deconfined critical point.

Affiliated with

Also associated with

No associations

Rating

Edge and impurity response in two-dimensional quantum 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 Edge and impurity response in two-dimensional quantum antiferromagnets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Edge and impurity response in two-dimensional quantum antiferromagnets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-548780