Spin gap of the three-leg S=3/2 Heisenberg tube

Details Spin gap of the three-leg S=3/2 Heisenberg tube Spin gap of the three-leg S=3/2 Heisenberg tube

2011-02-22

arxiv.org/abs/1102.4559v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures

Scientific paper

The ground-state properties of the three-leg S=3/2 Heisenberg tube are studied using the density-matrix renormalization group method. We find that the spin-excitation gap associated with a spontaneous dimerization opens for the whole coupling regime, as seen in the three-leg S=1/2 Heisenberg tube. However, in contrast to the case of S=1/2 tube, the gap increases very slowly with increasing the rung coupling and its size is only a few % or less of the leg exchange interaction in the weak- and intermediate-coupling regimes. We thus argue that, unless the rung coupling is substantially larger than the leg coupling, the gap may be quite hard to be observed experimentally. We also calcuate the quantized Berry phase to show that there exist three kinds of valence-bond-solid states depending on the ratio of leg and rung couplings.

Affiliated with

Also associated with

No associations

Rating

Spin gap of the three-leg S=3/2 Heisenberg tube 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 gap of the three-leg S=3/2 Heisenberg tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin gap of the three-leg S=3/2 Heisenberg tube will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-559871