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Capturing Coherent Magnons by Tip-Assisted Terahertz Spectroscopy

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Title
Capturing Coherent Magnons by Tip-Assisted Terahertz Spectroscopy
Author(s)
Byung Cheol Park; Oh, Sang Hyup; Choi, Young Jai; Taewoo Ha
Publication Date
2024-02
Journal
NANO LETTERS, v.24, no.8, pp.2529 - 2536
Publisher
AMER CHEMICAL SOC
Abstract
Our study highlights the versatility of tip-assisted terahertz spectroscopy in probing coherent magnons, the elementary quanta of spin waves in magnetic materials. We identify two distinct coherent magnon types in canted antiferromagnet YFeO3. The remarkable consistency with far-field terahertz spectroscopy in crucial magnon parameters, such as coherence time and resonance frequency, firmly establishes the credibility of tip-assisted terahertz spectroscopy. Notably, we capture more coherent ferromagnetic magnons near the sample surface, underscoring the strength of the technique. This approach paves the way for local, free-standing, and real-space investigations of spin waves in solid magnets.
URI
https://pr.ibs.re.kr/handle/8788114/14917
DOI
10.1021/acs.nanolett.3c04485
ISSN
1530-6984
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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