Generalized Fresnel-Floquet equations for driven quantum materials
| Autor: | Marios H. Michael, Michael Först, Daniele Nicoletti, Sheikh Rubaiat Ul Haque, Yuan Zhang, Andrea Cavalleri, Richard D. Averitt, Daniel Podolsky, Eugene Demler |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Superconductivity (cond-mat.supr-con)
Condensed Matter - Strongly Correlated Electrons Engineering Strongly Correlated Electrons (cond-mat.str-el) Condensed Matter - Mesoscale and Nanoscale Physics Fluids & Plasmas Condensed Matter::Superconductivity Condensed Matter - Superconductivity Physical Sciences Chemical Sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) FOS: Physical sciences Physics::Optics |
| Zdroj: | Physical Review B, 105 (17) Physical Review B Physical Review B, vol 105, iss 17 |
| ISSN: | 1098-0121 0163-1829 1550-235X 0556-2805 2469-9969 1095-3795 2469-9950 |
| Popis: | Optical drives at terahertz and midinfrared frequencies in quantum materials are increasingly used to reveal the nonlinear dynamics of collective modes in correlated many-body systems and their interplay with electromagnetic waves. Recent experiments demonstrated several surprising optical properties of transient states induced by driving, including the appearance of photo-induced edges in the reflectivity in cuprate superconductors (SCs), observed both below and above the equilibrium transition temperature. Furthermore, in other driven materials, reflection coefficients larger than unity have been observed. In this paper we demonstrate that unusual optical properties of photoexcited systems can be understood from the perspective of a Floquet system, a system with periodically modulated parameters originating from pump-induced oscillations of a collective mode. These oscillations lead to an effective Floquet system with periodically modulated parameters. We present a general phenomenological model of reflectivity from Floquet materials, which takes into account parametric generation of excitation pairs. We find a universal phase diagram of drive-induced features in reflectivity which evidence a competition between driving and dissipation. To illustrate our general analysis, we apply our formalism to two concrete examples motivated by recent experiments: A single plasmon band, which describes Josephson plasmons (JPs) in layered SCs, and a phonon-polariton system, which describes upper and lower polaritons in materials such as insulating SiC. Finally, we demonstrate that our model can be used to provide an accurate fit to results of phonon-pump-terahertz-probe experiments in the high-temperature SC YBa2Cu3O6.5. Our model explains the appearance of a pump-induced edge, which is higher in energy than the equilibrium JP edge, even if the interlayer Josephson coupling is suppressed by the pump pulse. Physical Review B, 105 (17) ISSN:1098-0121 ISSN:0163-1829 ISSN:1550-235X ISSN:0556-2805 ISSN:2469-9969 ISSN:1095-3795 ISSN:2469-9950 |
| Databáze: | OpenAIRE |
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