Antiferromagnetic long-range order in the uniform resonating valence bond state on the square lattice
Department of Physics, Renmin University of China - Beijing 100872, PRC
Received: 7 August 2013
Accepted: 29 August 2013
With an extensive variational Monte Carlo simulation, we show that the uniform resonating valence bond (U-RVB) state on the square lattice is antiferromagnetic long-range ordered. The ordered moment is estimated to be . Such a behavior is quite unexpected from the slave boson mean-field treatment or the Gutzwiller approximation of the uniform RVB state.
PACS: 75.10.Kt – Quantum spin liquids, valence bond phases and related phenomena / 71.27.+a – Strongly correlated electron systems; heavy fermions
© EPLA, 2013