Phonon-induced phase transition in a classical Heisenberg chain

Barma, Mustansir (1975) Phonon-induced phase transition in a classical Heisenberg chain Physical Review B: Condensed Matter and Materials Physics, 12 (7). pp. 2710-2715. ISSN 1098-0121

Full text not available from this repository.

Official URL:

Related URL:


The linear chain of classical Heisenberg spins coupled to phonons is studied. The coupling arises from the phonon-modulation of the nearest-neighbor exchange integral and the cases of both direct exchange and superexchange are treated. The phonons lead to an effective biquadratic interaction between spins, with important physical consequences. Thermodynamic functions at finite temperatures and zero field are evaluated exactly and discussed. It is shown that antiferromagnetically coupled spins in an external field at T=0°K can undergo a first-order phase transition; as the field crosses a critical value, the magnetization and lattice spacing change discontinuously.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:79581
Deposited On:27 Jan 2012 12:43
Last Modified:27 Jan 2012 12:43

Repository Staff Only: item control page