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Resonating plaquette phase of a quantum six-vertex model | Olav F. Syljuasen
; Sudip Chakravarty
; | Date: |
24 Sep 2005 | Subject: | Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el | Abstract: | The simplest quantum generalization of the six-vertex model describes fluctuations of the order parameter of the d-density wave (DDW), believed to compete with superconductivity in the high-Tc superconductors. The ground state of this model undergoes a first order transition from the DDW phase to a resonating plaquette phase as the quantum fluctuations are increased, which is explored with the help of quantum Monte Carlo simulations and analytic considerations involving the n-vector (n=2) model with cubic anisotropy. In addition to finding a new quantum state, we show that the DDW is robust against quantum fluctuations of its order parameter. The inferred finite temperature phase diagram contains unsuspected multicritical points. | Source: | arXiv, cond-mat/0509624 | Services: | Forum | Review | PDF | Favorites |
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