Strong terahertz third-harmonic generation by kinetic heavy quasiparticles in CaRuO$_3$
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866914792408612864 |
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| author | Reinhoffer, C. Esser, Sven Esser, Sebastian Mashkovich, E. A. Germanskiy, S. Gegenwart, P. Anders, F. van Loosdrecht, P. H. M. Wang, Zhe |
| author_facet | Reinhoffer, C. Esser, Sven Esser, Sebastian Mashkovich, E. A. Germanskiy, S. Gegenwart, P. Anders, F. van Loosdrecht, P. H. M. Wang, Zhe |
| contents | We report on time-resolved nonlinear terahertz spectroscopy of a strongly correlated ruthenate, CaRuO$_3$, as a function of temperature, frequency and terahertz field strength. Third-harmonic radiation for frequencies up to 2.1 THz is observed evidently at low temperatures below 80 K, where the low-frequency linear dynamical response deviates from the Drude model and a coherent heavy quasiparticle band emerges by strong correlations associated with the Hund's coupling.Phenomenologically, by taking an experimentally observed frequency-dependent scattering rate, the deviation of the field driven kinetics from the Drude behavior is reconciled in a time-dependent Boltzmann description, which allows an attribution of the observed third-harmonic generation to the terahertz field driven nonlinear kinetics of the heavy quasiparticles. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_05760 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Strong terahertz third-harmonic generation by kinetic heavy quasiparticles in CaRuO$_3$ Reinhoffer, C. Esser, Sven Esser, Sebastian Mashkovich, E. A. Germanskiy, S. Gegenwart, P. Anders, F. van Loosdrecht, P. H. M. Wang, Zhe Strongly Correlated Electrons Materials Science We report on time-resolved nonlinear terahertz spectroscopy of a strongly correlated ruthenate, CaRuO$_3$, as a function of temperature, frequency and terahertz field strength. Third-harmonic radiation for frequencies up to 2.1 THz is observed evidently at low temperatures below 80 K, where the low-frequency linear dynamical response deviates from the Drude model and a coherent heavy quasiparticle band emerges by strong correlations associated with the Hund's coupling.Phenomenologically, by taking an experimentally observed frequency-dependent scattering rate, the deviation of the field driven kinetics from the Drude behavior is reconciled in a time-dependent Boltzmann description, which allows an attribution of the observed third-harmonic generation to the terahertz field driven nonlinear kinetics of the heavy quasiparticles. |
| title | Strong terahertz third-harmonic generation by kinetic heavy quasiparticles in CaRuO$_3$ |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2310.05760 |