Quasi-one-dimensional anisotropic Heisenberg model in a transverse magnetic field

摘要

The phase diagram of weakly coupled $XXZ$ chains in a transverse magneticfield is studied using the mean-field approximation for the interchain couplingand known exact results for an effective one-dimensional model. Results areapplied to the quasi-one-dimensional antiferromagnet $Cs_{2}CoCl_{4}$ and thevalue of interchain interaction in this compound is estimated.