SU(N) Schwinger bosons and nematic phases in the bilinear–biquadratic S=1 triangular lattice antiferromagnet with third-nearest neighbor interactions
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Universidade Federal de Minas Gerais
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Artigo de periódico
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I present in details the SU(N) Schwinger boson formalism, also known as flavor wave theory, that has been used several times in the literature. I use the method to study the ferroquadrupolar phase of a quantum biquadratic Heisenberg model with spin S=1 on the triangular lattice with third-nearest-neighbor interactions. Results for the phase diagram at zero temperature and the static and dynamical quadrupolar structure factors are presented. In principle, the results could be applied to NiGa2S4.
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Antiferromagnetismo, Transições de fases
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Antiferromagnet, Biquadratic, Quantum phase transition
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https://www.sciencedirect.com/science/article/pii/S0304885316314305