Ultrafast optical polarimetry in magnetic phases of Kondo semi metal CeSb
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866911766603104256 |
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| author | Naseska, M. Zhigadlo, N. Jagličić, Z. Goreshnik, E. Mertelj, T. |
| author_facet | Naseska, M. Zhigadlo, N. Jagličić, Z. Goreshnik, E. Mertelj, T. |
| contents | We investigated photoinduced ultrafast transient dynamics in different magnetic phases in CeSb by means of the time resolved magneto-optical spectroscopy. We observe a distinctive coherent oscillations in the ground-state antiferromagnetic (AF) phase and the high-magnetic field ferromagnetic (F) phase. While the AF-phase oscillations 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 non-oscillatory part of the transients is qualitatively similar in all investigated magnetic phases with a faster sub-picosecond dynamics in the ferromagnetic and ferro-para-magnetic phases and is attributed to differences in the electronic structure, which affect the photo-excited quasiparticle energy relaxation kinetics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_02331 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Ultrafast optical polarimetry in magnetic phases of Kondo semi metal CeSb Naseska, M. Zhigadlo, N. Jagličić, Z. Goreshnik, E. Mertelj, T. Strongly Correlated Electrons We investigated photoinduced ultrafast transient dynamics in different magnetic phases in CeSb by means of the time resolved magneto-optical spectroscopy. We observe a distinctive coherent oscillations in the ground-state antiferromagnetic (AF) phase and the high-magnetic field ferromagnetic (F) phase. While the AF-phase oscillations 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 non-oscillatory part of the transients is qualitatively similar in all investigated magnetic phases with a faster sub-picosecond dynamics in the ferromagnetic and ferro-para-magnetic phases and is attributed to differences in the electronic structure, which affect the photo-excited quasiparticle energy relaxation kinetics. |
| title | Ultrafast optical polarimetry in magnetic phases of Kondo semi metal CeSb |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2309.02331 |