| Autor: |
Fabian Mertens, David Mönkebüscher, Umut Parlak, Carla Boix‐Constant, Samuel Mañas‐Valero, Margherita Matzer, Rajdeep Adhikari, Alberta Bonanni, Eugenio Coronado, Alexandra M. Kalashnikova, Davide Bossini, Mirko Cinchetti |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Mertens, Fabian Mönkebüscher, David Parlak, Umut Boix Constant, Carla Mañas Valero, Samuel Matzer, Margherita Adhikari, Rajdeep Bonanni, Alberta Coronado Miralles, Eugenio Kalashnikova, Alexandra M. Bossini, Davide Cinchetti, Mirko 2022 Ultrafast coherent THz lattice dynamics coupled to spins in the van der Waals antiferromagnet FePS3 Advanced Materials 35 6 2208355 |
| Popis: |
Coherent THz optical lattice and hybridized phonon–magnon modes are triggered by femtosecond laser pulses in the antiferromagnetic van der Waals semiconductor FePS3. The laser-driven lattice and spin dynamics are investigated in a bulk crystal as well as in a 380 nm-thick exfoliated flake as a function of the excitation photon energy, sample temperature and applied magnetic field. The pump-probe magneto-optical measurements reveal that the amplitude of a coherent phonon mode oscillating at 3.2 THz decreases as the sample is heated up to the Néel temperature. This signal eventually vanishes as the phase transition to the paramagnetic phase occurs, thus revealing its connection to the long-range magnetic order. In the presence of an external magnetic field, the optically triggered 3.2 THz phonon hybridizes with a magnon mode, which is utilized to excite the hybridized phonon–magnon mode optically. These findings open a pathway toward the optical control of coherent THz photo–magnonic dynamics in a van der Waals antiferromagnet, which can be scaled down to the 2D limit. published |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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