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Magnetoelastic excitations in multiferroic hexagonal YMnO3 studied by inelastic x-ray scattering

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Title
Magnetoelastic excitations in multiferroic hexagonal YMnO3 studied by inelastic x-ray scattering
Author(s)
Kisoo Park; Joosung Oh; Ki Hoon Lee; Jonathan C. Leiner; Hasung Sim; Ho-Hyun Nahm; Taehun Kim; Jaehong Jeong; Daisuke Ishikawa; Alfred Q. R. Baron; Je-Geun Park
Subject
INITIO MOLECULAR-DYNAMICS, ; TOTAL-ENERGY CALCULATIONS, ; MAGNON, ; SPIN
Publication Date
2020-08
Journal
PHYSICAL REVIEW B, v.102, no.8, pp.085110
Publisher
AMER PHYSICAL SOC
Abstract
© 2020 American Physical Society. Despite extensive studies, the exact mechanism of magnetoelastic coupling in hexagonal rare-earth manganite RMnO3 still remains under debate. Using inelastic x-ray scattering, we have measured the lattice vibrations of hexagonal manganite RMnO3 over a wide momentum-energy space to identify clear magnetoelastic excitations, which are the long-sought-after direct evidence of the dynamic magnon-phonon coupling. Our calculations using a magnetoelastic coupling model of superexchange striction quantitatively reproduces the experimental observations. Based on these results, we present a broadly applicable method to analyze the mode and momentum dependence of the magnon-phonon coupling for noncollinear magnets
URI
https://pr.ibs.re.kr/handle/8788114/7700
DOI
10.1103/PhysRevB.102.085110
ISSN
2469-9950
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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