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Strain-dependent ultrafast carrier dynamics and spin–lattice interaction in LaMnO3 films.
- Source :
- Applied Physics Letters; 4/8/2024, Vol. 124 Issue 15, p1-5, 5p
- Publication Year :
- 2024
-
Abstract
- We investigate the ultrafast carrier dynamics and spin–lattice interaction in strained and unstrained LaMnO<subscript>3</subscript> films via temperature-dependent femtosecond transient optical spectroscopy. The transient reflectivity measurements show two characteristic relaxation processes in both types of films, which are attributed to electron–phonon coupling and phonon-assisted spin–lattice interaction, respectively. The carrier dynamics and coupling between lattice and spin system are well described with the three-temperature model; the spin–lattice relaxation time constant is dominated by the temperature-dependent spin specific heat. Both the electron–phonon coupling and the spin–lattice interaction are enhanced in the strained film, as a result of the modified band structure and orbital ordering under biaxial compressive strain. Our results reveal the critical role of strain in the photo-induced dynamical interactions in LaMnO<subscript>3</subscript>. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 124
- Issue :
- 15
- Database :
- Complementary Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 176579131
- Full Text :
- https://doi.org/10.1063/5.0200237