Critical properties of the frustrated quasi-two dimensional XY-like antiferromagnet

AbstractWe study, using a self-consistent harmonic approximation, the quasi-two-dimensional frustrated Heisenberg antiferromagnet with easy-plane single ion anisotropy. Besides the transition temperature from the high-temperature paramagnetic phase to the low-temperature ordered phase, we also obtain, at zero temperature, the critical single ion anisotropy parameter Dc that separates the low D region from the large D quantum paramagnetic phase. We have found disordered phases at zero temperature that could be possible candidates for spin liquids states