Magnetic properties and concurrence for fluid 3He on kagome lattice

Details Magnetic properties and concurrence for fluid 3He on kagome lattice Magnetic properties and concurrence for fluid 3He on kagome lattice

2011-02-13

arxiv.org/abs/1102.2603v2

Physics

Condensed Matter

Statistical Mechanics

Physics of Atomic Nuclei (accepted for publication) 2011

Scientific paper

We present the results of magnetic properties and entanglement for kagome lattice using Heisenberg model with two-, and three-site exchange interactions in strong magnetic field. Kagome lattice correspond to the third layer of fluid 3He absorbed on the surface of graphite. The magnetic properties and concurrence as a measure of pairwise thermal entanglement are studied by means of variational mean-field like treatment based on Gibbs-Bogoliubov inequality. The system exhibits different magnetic behaviors, depending on the values of the exchange parameters (J2, J3). We have obtained the magnetization plateaus at low temperatures. The central theme of the paper is the comparing the entanglement and magnetic behavior for kagome lattice. We have found that in the antiferromagnetic region behaviour of the concurrence coincides with the magnetization one.

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