Magnon spectrum and electron spin resonance in antiferromagnet with large single-ion easy plane anisotropy

Artemiy S. Sherbakov, Oleg I. Utesov

Motivated by recent experiments on quantum magnet NiCl${}_2$-4SC(NH${}_2$)${}_2$ (DTN) and its Br-doped counterpart DTNX we propose a theoretical description of optical magnon bran…