Quantum and thermal transitions out of the supersolid phase of a 2D quantum antiferromagnet

Details Quantum and thermal transitions out of the supersolid phase of a 2D quantum antiferromagnet Quantum and thermal transitions out of the supersolid phase of a 2D quantum antiferromagnet

2007-02-09

arxiv.org/abs/cond-mat/0702249v2

Phys. Rev. Lett. 99, 027202 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

To appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.99.027202

We investigate the thermodynamic properties of a field-induced supersolid phase in a 2D quantum antiferromagnet model. Using quantum Monte Carlo simulations, a very rich phase diagram is mapped out in the temperature - magnetic field plane, with an extended supersolid region where a diagonal (solid) order coexists with a finite XY spin stiffness (superfluid). The various quantum and thermal transitions out of the supersolid state are characterized. Experimental consequences in the context of field-induced magnetization plateau materials are briefly discussed.

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