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    Abnormal Hot Carrier Decay via Spin-Phonon Coupling in Intercalated van der Waals Ferromagnetic Fe 1/3 TaS 2

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    Type
    Article
    Authors
    Li, Ning
    Zhang, Chenhui cc
    Liang, Weizheng cc
    Zhang, Xixiang cc
    Luo, Sheng-Nian
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2022-05-13
    Embargo End Date
    2023-05-13
    Permanent link to this record
    http://hdl.handle.net/10754/677916
    
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    Abstract
    Spin–phonon coupling is a fundamental interaction in ferromagnets/antiferromagnets and plays a key role in hot carrier decay. Normally, spin transfers its excess energy to a lattice via spin–phonon coupling in hot carrier decay in ferromagnets/antiferromagnets. However, the reverse energy transfer process (i.e., from lattice to spin) is feasible in principle but rarely reported. Here, we observe an abnormal hot carrier decay with a slow fall (80 ps) in ΔR(t)/R0 time series in ferromagnet Fe1/3TaS2, which is a result of the lattice of TaS2 vdW layer transfering its energy to spin via spin–phonon coupling. The Fe ions inserted between TaS2 vdW layers with very weak bonding with TaS2 vdW layer, are the origin of the ferromagnetism and give rise to its weak electron–spin and spin–phonon couplings which in turn lead to the observed abnormal hot carrier decay in the ferromagnetic phase Fe1/3TaS2.
    Citation
    Li, N., Zhang, C., Liang, W., Zhang, X., & Luo, S.-N. (2022). Abnormal Hot Carrier Decay via Spin–Phonon Coupling in Intercalated van der Waals Ferromagnetic Fe1/3TaS2. Nano Letters. https://doi.org/10.1021/acs.nanolett.1c04064
    Sponsors
    This work was sponsored by Southwest Jiaotong University.
    Publisher
    American Chemical Society (ACS)
    Journal
    Nano Letters
    DOI
    10.1021/acs.nanolett.1c04064
    PubMed ID
    35549246
    Additional Links
    https://pubs.acs.org/doi/10.1021/acs.nanolett.1c04064
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.nanolett.1c04064
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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