Frustrated bilayer spin one XY model on the honeycomb lattice
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Universidade Federal de Minas Gerais
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The spin-one honeycomb bilayer XY antiferromagnet has been studied taking into account the effect of the next-near neighbor J2 exchange interactions and single-ion easy plane anisotropy, using a flavor wave theory. We found that, at a critical point =α 13.8C , where = ⊥α J J/ 1 is the ratio between the interlayer ⊥J to the intralayer near neighbor J1 exchange interaction, the system shows a quantum phase transition from an Néel ordered phase to a paramagnetic phase. The phase diagram at zero temperature is presented.
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Antiferromagnetismo, Modelo de Heisenberg, Transições de fases
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Antiferromagnet, Frustrated systems, Heisenberg model, Quantum phase transitions
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https://www.sciencedirect.com/science/article/pii/S1386947718315881