Phase Diagram of the 2-Leg Heisenberg Ladder with Alternating Dimerization
M. A. Martin-Delgado, J. Dukelsky, G. Sierra
Abstract
Using the Lanczos method we determine the phase diagram of the 2-leg AF-Heisenberg ladder with alternating dimerization. It consists of a resonating valence bond phase and a dimer phase separated by a critical line. Our results are in good agreement with previous conjectures obtained with the non linear sigma model.
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