Figure 3: Comparison to thermodynamic data.
From: The quantum nature of skyrmions and half-skyrmions in Cu2OSeO3
(a) Experimental susceptibility χ(T) (squares, data evaluted from 1/χ dependence in Fig. 4a of ref. 20) in comparison with Quantum Monte Carlo (QMC) simulations for the microscopic magnetic model (solid line). (b) QMC simulations for the local spin lengths ‹Sz› of Cu(1) and Cu(2) spins as a function of temperature. The shaded area shows the magnetically ordered region. Arrows indicate the limiting values of the local spin lengths as T→0. (c) Experimental51 T dependence of the magnetization in external magnetic fields of 0.5, 4.5 and 14 Tesla (circles) in comparison with QMC simulations for the microscopic magnetic model (lines). The simulated χ*(T/J) and M*(T/J) curves are scaled with J=170 K and the experimental g=2.11 (ref. 21). (d) Finite-size scaling of the spin stiffness for finite lattices up to N=8,192 sites. The crossing point T/J≃0.34 indicates the ordering temperature.
