Magnetic structure in a soliton lattice state of a spin-Peierls system under applied fields

Abstract

On the basis of the mean-field Pytte Hamiltonian on a spin-Peierls system under applied fields, the authors investigate the magnetic structure in the incommensurate high-field phase. Utilising the soliton lattice solution which is analytically exact in the mean-field approximation, they study the temperature and field dependences of the magnetic component of the staggered spin configuration originating from the inherent antiferromagnetic nature of spin-Peierls system, in addition to the component of the modulated magnetisation induced by forming the soliton lattice state to gain the Zeeman energy. The former component in the magnetic structure should have a significant influence on microscopy measurements such as nuclear magnetic resonance and electron spin resonance experiments.