2021/09/30 by S. Acevedo, C. A. Lamas, P. Pujol +1
Materials Science · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Bioinformatics #Condensed matter physics #Degeneracy (biology) #Geometry #Heisenberg model #Ising model #Lattice (music) #Magnetic and transport properties of perovskites and related materials #Mathematics #Parameter space #Physics #Physics of Superconductivity and Magnetism #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.104.214412
openalex publication_date 2021/12/08 · arxiv created 2021/12/14 · arxiv updated 2021/12/15 · openalex created_date 2021/12/31 · openalex updated_date 2026/07/22
The spin-(3)/(2) 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.