Bose-Einstein condensation of magnons in Cs${}_2$CuCl${}_4$: a dilute gas limit near the saturation magnetic field

D. L. Kovrizhin, V. Yushankhai, L. Siurakshina

Based on a realistic spin Hamiltonian for a frustrated quasi-two dimensional spin-1/2 antiferromagnet Cs${}_2$CuCl${}_4$, a three-dimensional spin ordering in the applied magnetic…