Fig. 6: Spin correlations in the HKQ model at ϕ = 0.85π.
From: Twice hidden string order and competing phases in the spin-1/2 Kitaev–Gamma ladder

DMRG results with N = 384 for the correlation function 4〈S″y(0)S″y(r)〉 versus distance, r along one leg of the ladder. r = 0 corresponds to site 47. Results are for HKQ with ϕ = 0.85π and r is measured in lattice spacings along the leg.