Quasi-two-dimensional Bose-Einstein condensation of lattice bosons in spin-1/2 XXZ ferromagnet K${}_2$CuF${}_4$

Satoshi Hirata, Nobuyuki Kurita, Motoki Yamada +1

K${}_2$CuF${}_4$ is magnetically described as a spin-1/2, quasi-two-dimensional (2D), square-lattice XXZ ferromagnet with weak easy-plane anisotropy. The magnetic ordering for an appli…