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Combined analytical and numerical approach to study magnetization plateaux in doped quasi-one-dimensional antiferromagnets

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Figure

FIG. 1. Classical configuration for a spin chain in the presenceof a magnetic field.
FIG. 2. Classical configuration for a spin ladder in the pres-ence of a magnetic field.
FIG. 3. (Color online) Magnetization curve ( ˜m) for the S =3/2 chain corresponding to D/J = 5 obtained with DMRG.
FIG. 5.(Color online) Magnetization ˜trimerized chain withm for the S = 1/2 γ = 1/4 and J/t = 0.5, obtained byDMRG simulations for different values of the filling on chainof length L = 120

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