Quantum effects on a graphene-like material with four-sublattice

An-Bang Guo, Wei Jiang and Na Zhang

Physica A: Statistical Mechanics and its Applications, 2018, vol. 490, issue C, 1138-1149

Abstract: A Heisenberg model is formed by a graphene-like material with four-sublattice, which the intralayer exchange coupling of upper layer is ferromagnetic and that of bottom layer is antiferrimagnetic. The retarded Green’s function and the linear spin-wave approximation are introduced to study the magnetic properties of the system. The effects of various parameters in the ground state properties of the system, such as the spin-wave spectra, energy gap and the magnetization have been studied. Two energy gaps are found in the spin-wave spectra. The antiferrimagnetic couplings and spin quantum numbers play important roles on energy gaps and sublattice magnetization.

Keywords: Graphene-like; Energy gaps; Quantum fluctuation; Spin-wave; Magnetic properties (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:490:y:2018:i:c:p:1138-1149

DOI: 10.1016/j.physa.2017.08.147

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