Laser-induced coherent acoustical phonons mechanisms in the metal-insulator transition compound NdNiO3: Thermal and nonthermal processes

S. Zhang , P. Ruello (1) , P. Laffez (1) , Bernard Perrin (2) , Vitali Goussev (1)

1 LPEC - Laboratoire de physique de l'état condensé
2 INSP - Institut des Nanosciences de Paris

Coherent acoustic phonon generation processes on the picosecond time scale were investigated in the metal-insulator transition compound NdNiO3. Time-resolved optical pump-probe methods were employed. While at high temperature thermoelastic process drives the photogeneration of acoustic phonons, an additional contribution can be identified when the transition to the insulating state at T

Mots clés: electron-phonon interactions; high-speed optical techniques; high-temperature effects; metal-insulator transition; metastable states; neodymium compounds; thermal expansion; thermoelasticity; time resolved spectra

Domaines: Science des matériaux [cond-mat.mtrl-sci]

S. Zhang, P. Ruello, P. Laffez, Bernard Perrin, Vitali Goussev. Laser-induced coherent acoustical phonons mechanisms in the metal-insulator transition compound NdNiO3: Thermal and nonthermal processes. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2009, 79, pp.094303. ⟨10.1103/PhysRevB.79.094303⟩. ⟨hal-00418664⟩