Abstract
A semi-infinite bidimensional Heisenberg frustrated antiferromagnet system is considered, where the magnetic frustration phenomena are due to the competition of the first inter-sublattice ( J 1v AB) and the second intra-sublattice ( J 2v AA(BB)) exchange interactions. The bulk and surface spin-waves are calculated as a function of the frustration parameter J 1 v AB J 2 v AA(BB) , accounting for Dzyaloshinsky-Moriya (DM) type coupling. The principle of the matching method is detailed by coupling the properties of bulk magnons with evanescent spin-waves along the direction perpendicular to the surface. It is shown that the behaviour of the bulk magnon, as well as acoustic and optic surface spin-waves, is very sensitive to surface exchange and anisotropy. The evolutions of acoustic and optic surface modes are interpreted by means of a frustration parameter, and the DM term induces a bulk magnon gap band, consistent with an anisotropic term
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
