Quantum Non-Magnetic state near Metal-Insulator Transition - a Possible Candidate of Spin Liquid State
arXiv:0812.2524 · doi:10.1209/0295-5075/87/67002
Abstract
In this paper, based on the formulation of an O(3) non-linear sigma model, we study the two-dimensional Pi-flux Hubbard model at half-filling. A quantum non-magnetic insulator is explored near the metal-insulator transition that may be a possible candidate of the spin liquid state. Such quantum non-magnetic insulator on square lattice is not induced by frustrations. Instead, it originates from quantum spin fluctuations with relatively small effective spin moments. In the strong-coupling limit, our results of the spin velocity and spin order parameter agree with results obtained from earlier calculations.
6 pages, 6 figures, Version of publication in EPL, removing the contents of honeycomb lattice and adding some contents of square lattice
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Cited by in corpus (6)
- Chiral Spin Liquid in Correlated Topological Insulator
- Quantum disordered phase near the Mott transition in the staggered-flux Hubbard model on a square lattice
- Topological Phases of Fermionic Ladders with Periodic Magnetic Fields
- Composite Spin Liquid in Correlated Topological Insulator - Spin Liquid without Spin-Charge Separation
- Anomalous Spin Dynamics of Hubbard Model on Honeycomb Lattices
- Strongly fluctuating fermionic superfluid in attractive π-flux Hubbard model