info:eu-repo/semantics/article
Effective field theory approach for the S= 32 bilayer honeycomb antiferromagnet
Registro en:
Lamas, Carlos Alberto; Acevedo, Santiago Daniel; Pujol, P.; Effective field theory approach for the S= 32 bilayer honeycomb antiferromagnet; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 104; 21; 12-2021; 214412-214419
1098-0121
CONICET Digital
CONICET
Autor
Lamas, Carlos Alberto
Acevedo, Santiago Daniel
Pujol, P.
Resumen
The spin-32 Heisenberg antiferromagnet on the bilayer honeycomb lattice is a minimal model to describe the magnetic behavior of Bi3Mn4O12(NO3). We study this model with frustrating interlayer second-neighbor couplings taking into account quantum and thermal fluctuations. We use a path integral formulation in terms of coherent states to describe the low-energy physics of the model. We show that for a particular point in the parameter space, close to the experimental estimated couplings, a continuum classical degeneracy is lifted by both quantum and thermal fluctuations, and a collinear state is then selected by an order by disorder mechanism. Our results provide a global perspective in the understanding of the experimental observations. Fil: Lamas, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina Fil: Acevedo, Santiago Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina Fil: Pujol, P.. Université Paul Sabatier; Francia