Effects of Single-site Anisotropy on Mixed Diamond Chains with Spins 1 and 1/2
Abstract
Effects of single-site anisotropy on mixed diamond chains with spins 1 and 1/2 are investigated in the ground states and at finite temperatures. There are phases where the ground state is a spin cluster solid, i.e., an array of uncorrelated spin-1 clusters separated by singlet dimers. The ground state is nonmagnetic for the easy-plane anisotropy, while it is paramagnetic for the easy-axis anisotropy. Also, there are the N\'eel, Haldane, and large- phases, where the ground state is a single spin cluster of infinite size and the system is equivalent to the spin-1 Heisenberg chain with alternating anisotropy. The longitudinal and transverse susceptibilities and entropy are calculated at finite temperatures in the spin-cluster-solid phases. Their low-temperature behaviors are sensitive to anisotropy.
Keywords
Cite
@article{arxiv.1106.3846,
title = {Effects of Single-site Anisotropy on Mixed Diamond Chains with Spins 1 and 1/2},
author = {Kazuo Hida and Ken'ichi Takano},
journal= {arXiv preprint arXiv:1106.3846},
year = {2011}
}
Comments
8 pages, 4 figures