Ground State and Finite Temperature Properties of Mixed Diamond Chains with Spins 1 and 1/2 with Single-site Anisotropy
Year: 2011
Type: preprint
Abstract: Ground states and finite temperature properties of mixed diamond chains with spins 1 and1/2 which has the single-site anisotropy on spin-1 sites are investigated. There are phaseswhere the ground state is a spin cluster solid, i. e. an array of uncorrelated spin-1 clustersseparated 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, andlarge-D phases, where the ground state is a single spin cluster of infinite size and the systemis equivalent to the spin-1 Heisenberg chain with alternating anisotropy. The longitudinal andtransverse susceptibilities and entropy are calculated at finite temperatures in the spin-cluster-solid phases. Their low temperature behaviors are sensitive to the anisotropy.KEYWORDS: mixed diamond chain, anisotropy, frustration, spin cluster solid, N´eel phase, Haldane phase,large-Dphase
Source: arXiv (Cornell University)
Author: Kazuo Hida
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1036302000