Easy-plane antiferromagnet in tilted field: gap in magnon spectrum and susceptibility

Artemiy S. Sherbakov, Oleg I. Utesov

Motivated by recent experimental data on dichloro-tetrakis thiourea-nickel (DTN) [T.A. Soldatov $\text{et al}$, Phys. Rev. B $101$, 104410 (2020)], a model of antiferromagn…