Diamond chains with multiple-spin exchange interactions
Strongly Correlated Electrons
2009-03-17 v2
Abstract
We study the phase diagram of a symmetric spin-1/2 Heisenberg diamond chain with additional cyclic four-spin exchange interactions. The presented analysis supplemented by numerical exact-diagonalization results for finite periodic clusters implies a rich phase diagram containing, apart from standard magnetic and spin-liquid phases, two different tetramer-dimer phases as well as an exotic four-fold degenerate dimerized phase. The characteristics of the established spin phases as well as the nature of quantum phase transitions are discussed, as well.
Cite
@article{arxiv.0812.0133,
title = {Diamond chains with multiple-spin exchange interactions},
author = {N. B. Ivanov and J. Richter and J. Schulenburg},
journal= {arXiv preprint arXiv:0812.0133},
year = {2009}
}
Comments
6 PRB pages, Added references