Thermodynamics and Correlation Functions of Non-Linear Excitations in the Easy-Plane Ferromagnetic Chain

Abstract

The easy-plane ferromagnetic chain with an in-plane symmetry-breaking magnetic field defined by the Hamiltonian $$H' = - J\sum\limits_n {{{\vec S}_n}} {\vec S_{n + 1}} + A\sum\limits_n {{{\left( {S_n^x} \right)}^2}} - g{\mu _B}{H_O}\sum\limits_n {S_n^z} $$ (1) is generally believed [1] to describe the excitation spectrum of the magnetic salt CsNiF3. Owing to the fact that the model (1) in the classical long wave-length limit besides the usual linear extended spin wave spectrum also supports non-linear localized finite-energy domain wall or soliton excitations, this system has attracted much attention both from an experimental and a theoretical point of view.KeywordsDomain WallSpin WaveDynamic Structure FactorDomain Wall SolutionStatic Correlation FunctionThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.