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  • Ultrafast optical polarimetry in magnetic phases of the Kondo semimetal CeSb [Elektronski vir]
    Naseska, Mimoza ...
    We investigated photoinduced ultrafast transient dynamics in different magnetic phases in CeSb by means of time resolved magneto-optical spectroscopy. We observe distinctive coherent oscillations in ... the ground-state antiferromagnetic (AF) phase and the high-magnetic-field ferromagnetic (F) phase. While the AF-phase oscillation frequencies match the recent Raman scattering findings the F-phase oscillation frequency does not correspond to the previously observed magnetic excitation. The large spectroscopic factor, g = 3.94 , and optical polarization properties suggest that it corresponds to a previously undetected Ce 3 + coherent crystal-field state excitation. The AF-phase oscillations show no magnetic-field dependence so their lattice origin cannot be entirely excluded. The nonoscillatory part of the transients is qualitatively similar in all investigated magnetic phases with a faster subpicosecond dynamics in the ferromagnetic and ferroparamagnetic phases and is attributed to differences in the electronic structure, which affect the photoexcited quasiparticle energy relaxation kinetics.
    Vir: Physical review. B. [Elektronski vir]. - ISSN 2469-9969 (Vol. 109, iss. 12, 21 Mar. 2024, str. 125140-1- 125140-11)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 2024
    Jezik - angleški
    COBISS.SI-ID - 190177795

    Povezava(-e):

    https://journals.aps.org/prb/abstract/10.1103/PhysRevB.109.125140
    DOI

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