Article ID Journal Published Year Pages File Type
1591522 Solid State Communications 2015 5 Pages PDF
Abstract

•The SU(3) Schwinger boson formalism is used in this paper.•The phase diagram at zero temperature is shown.•The static quadrupole structure factor is calculated.

I study the spin one J1–J2–J3 Heisenberg model with easy plane single- ion anisotropy on the square lattice with ferromagnetic 1st neighbor and antiferromagnetic 2nd and 3rd neighbor interactions by means of the SU(3) Schwinger boson formalism. I show that quantum fluctuations lead to a strong modification of the classical phase diagram. A nematic phase was found at T  =0. Although the system behaves like an XY model, in the nematic phase the single ion anisotropy term leads to strong quantum fluctuations and induces a net nematic component. As a consequence the quadrupole structure factor <(Sqz)2(S−qz)2> has a strong peak at the wave vector q =(0,0).

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Physical Sciences and Engineering Materials Science Materials Science (General)
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