Spin dynamics of a one-dimensional spin-1/2 fully anisotropic Ising-like antiferromagnet in a transverse magnetic field

We consider the one-dimensional Ising-like fully anisotropic S = 1/2 Heisenberg antiferromagnetic Hamiltonian and study the dynamics of domain wall excitations in the presence of a transverse magnetic field h,. We obtain dynamical spin correlation functions along the magnetic field, S-xx(q, w), and perpendicular to it, S-yy(q, w). It is shown that the line shapes of S-xx(q, w) and S-yy(q, w) are purely symmetric at the zone boundary. It is observed in S-yy(q, w) for pi /2 < q < pi that the spectral weight moves toward the low-energy side with the increase of h(x). This model is applicable to the study of the spin dynamics of CsCoCl3 in the presence of weak interchain interactions.