Magnon Broadening Effects in Double Layered Manganite La_1.2 Sr_1.8 Mn_2 O_7
Nobuo Furukawa, Kazuma Hirota
TL;DR
This paper investigates the magnon linewidth in La_1.2 Sr_1.8 Mn_2 O_7, combining theoretical and experimental approaches to understand abrupt magnon broadening due to magnon-phonon coupling, with comparisons to cubic perovskite manganites.
Contribution
It provides a combined theoretical and experimental analysis of magnon broadening effects in layered manganite La_1.2 Sr_1.8 Mn_2 O_7, highlighting the role of magnon-phonon interactions.
Findings
Magnon linewidth increases near the Brillouin zone boundary.
Abrupt magnon broadening is linked to strong magnon-phonon coupling.
Similar broadening effects are discussed in cubic perovskite manganites.
Abstract
Magnon linewidth of La_1.2 Sr_1.8 Mn_2 O_7 near the Brillouin zone boundary is investigated from both theoretical and experimental points of view. Abrupt magnon broadening is ascribed to a strong magnon-phonon coupling. Magnon broadening observed in cubic perovskite manganites is also discussed.
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