Low-temperature thermodynamics of spin-1/2 orthogonal-dimer chain with Ising and Heisenberg interactions
Statistical Mechanics
2014-10-21 v1 Strongly Correlated Electrons
Abstract
We consider an exactly solvable version of the quantum spin-1/2 orthogonal-dimer chain with the Heisenberg intra-dimer and Ising inter-dimer couplings. The investigated quantum spin system exhibits at zero temperature fractional plateaux at 1/4 and 1/2 of the saturation magnetization and it has a highly degenerate ground state at critical fields where the magnetization jumps. We study the field dependence of the specific heat at low temperature. The lattice-gas description is formulated in a vicinity of critical fields to explain the low-temperature behaviour of specific heat.
Keywords
Cite
@article{arxiv.1307.1005,
title = {Low-temperature thermodynamics of spin-1/2 orthogonal-dimer chain with Ising and Heisenberg interactions},
author = {T. Verkholyak and J. Strecka},
journal= {arXiv preprint arXiv:1307.1005},
year = {2014}
}
Comments
2 pages, 1 figure, contribution to proceedings of CSMAG'13 conference