Exchange distortion and spin Jahn-Teller effect for triangular and tetrahedral spin clusters of spin-1/2
Other Condensed Matter
2015-06-25 v1 Materials Science
Abstract
We study the effects of magneto-elastic coupling on the degenerate ground state of the antiferromagnetic Heisenberg model on regular triangle and tetrahedron clusters of spin-1/2. Both give very similar results. Static distortion lifts the degeneracy of the ground state through the distance dependence of the exchange coupling. On the contrary, quantum-mechanical or dynamical distortion does not. The tetragonal distortion at the non-magnetic phase transition of spinels is discussed.
Keywords
Cite
@article{arxiv.cond-mat/0606055,
title = {Exchange distortion and spin Jahn-Teller effect for triangular and tetrahedral spin clusters of spin-1/2},
author = {Kiyosi Terao and Ikumi Honda},
journal= {arXiv preprint arXiv:cond-mat/0606055},
year = {2015}
}
Comments
2 pages, 2 figures, submitted to ICM2006