A Generalized Quantum Dimer Model Applied to the Frustrated Heisenberg Model on the Square Lattice: Emergence of a Mixed Columnar-Plaquette Phase - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




A Generalized Quantum Dimer Model Applied to the Frustrated Heisenberg Model on the Square Lattice: Emergence of a Mixed Columnar-Plaquette Phase - Condensed Matter > Strongly Correlated Electrons - Download this document for free, or read online. Document in PDF available to download.

Abstract: Aiming to describe frustrated quantum magnets with non-magnetic singletground states, we have extended the Rokhsar-Kivelson RK loop-expansion toderive a generalized Quantum Dimer Model containing only connected terms up toarbitrary order. For the square lattice frustrated Heisenberg antiferromagnetJ1-J2-J3 model, an expansion up to 8th order shows that the leadingcorrection to the original RK model comes from dimer moves on length-6 loops.This model free of the original sign problem is treated by advanced numericaltechniques. The results suggest that a rotationally anisotropic plaquette phaseis the ground state of the Heisenberg model in the parameter region of maximumfrustration.



Author: A. Ralko NEEL, M. Mambrini LPT, Toulouse, D. Poilblanc LPT, Toulouse

Source: https://arxiv.org/







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