External Stress Influence on the Spin-Peierls Phase Diagram of the XY Model

摘要

Within a framework in which the structural degrees of freedom (assumed essentially three-dimensional) are adiabatically treated and the magnetic degrees of freedom are exactly treated, the stress-(magnetic) field-temperature phase diagram associated with the one-dimensional first-neighbour spin-1/2 magnetostrictive XY model is discussed. The important influence of the curvature of the coupling constant as a function of distance is exhibited and satisfactorily compared to experimental data. (Atomindex citation 16:025319)