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Theoretical studies of the phase transition in the anisotropic 2-D square spin lattice

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Academic year: 2021

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FIG. 2: Cohesive energy as a function of the anisotropy pa- pa-rameter λ. (+) DCM (from a 16-site cluster) with the N´eel reference function, () DCM (from a 16-site cluster) with the XY polarized reference function.
FIG. 3: Cohesive energy around the isotropic point. (◦)
FIG. 4: RSRG study: anisotropic parameter Φ (1) after the
FIG. 5: Appearance of the gap in the λ > 1 phase, as cal- cal-culated from the RSRG-EI

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