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arXiv · 0710.0398

Spin Supersolid in Anisotropic Spin-One Heisenberg Chain

Pinaki Sengupta·Cristian D. Batista
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Abstract

We consider an S=1 Heisenberg chain with strong exchange (Delta) and single--ion uniaxial anisotropy (D) in a magnetic field (B) along the symmetry axis. The low energy spectrum is described by an effective S=1/2 XXZ model that acts on two different low energy sectors for a given window of fields. The vacuum of each sector exhibits Ising-like antiferromagnetic ordering that coexists with the finite spin stiffness obtained from the exact solution of the effective XXZ model. In this way, we demonstrate the existence of a spin supersolid phase. We also compute the full Delta-B quantum phase diagram by means of a quantum Monte Carlo simulation.

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Pinaki Sengupta, Cristian D. Batista. 2007-10-01. Spin Supersolid in Anisotropic Spin-One Heisenberg Chain. https://doi.org/10.1103/physrevlett.99.217205

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