Magnetic and Critical Properties of Alternating Spin Chain with S=1/2,1 in Magnetic Fields

Preprint

5 November 1996

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9611026

Abstract

We study an integrable spin chain with an alternating array of spins S=1/2, 1 in external magnetic fields using the Bethe ansatz exact solution. The calculated magnetization possesses a cusp structure at a critical magnetic field H=H_{C}, at which the specific heat shows a divergence property. We also calculate finite-size corrections to the energy spectrum, and obtain the critical exponents of correlation functions with the use of conformal field theory (CFT). Low-energy properties of the model are described by two c=1 U(1) CFTs in HH_{C}.

Keywords

ALTERNATING SPIN CHAIN
MAGNETIC AND CRITICAL
INTEGRABLE SPIN
MAGNETIC FIELDS
SPIN CHAIN
PROPERTY
CFT

All Related Versions

Version 1, 1996-11-05, ArXiv
Published version: Journal of the Physics Society Japan, 65 (8), 2381.

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