Time-dependent Schwinger boson mean-field theory of supermagnonic propagation in 2D antiferromagnets

Autor:	Bouman, M. D., Mentink, J. H.
Rok vydání:	2023
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
Popis:	Understanding the speed limits for the propagation of magnons is of key importance for the development of ultrafast spintronics and magnonics. Recently, it was predicted that in 2D antiferromagnets, spin correlations can propagate faster than the highest magnon velocity. Here we gain deeper understanding of this supermagnonic effect based on time-dependent Schwinger boson mean-field theory. We find that the supermagnonic effect is determined by the competition between propagating magnons and a localized quasi-bound state, which is tunable by lattice coordination and quantum spin value $S$, suggesting a new scenario to enhance magnon propagation. Comment: 25 pages, 9 figures, 3 appendices, submitted to SciPost
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2306.16382 Zobrazit plný text záznamu View this record from Arxiv