Nonlinear Electron-Phonon Coupling in Doped Manganites.
Phys Rev Lett
; 118(24): 247601, 2017 Jun 16.
Article
in En
| MEDLINE
| ID: mdl-28665638
ABSTRACT
We employ time-resolved resonant x-ray diffraction to study the melting of charge order and the associated insulator-to-metal transition in the doped manganite Pr_{0.5}Ca_{0.5}MnO_{3} after resonant excitation of a high-frequency infrared-active lattice mode. We find that the charge order reduces promptly and highly nonlinearly as function of excitation fluence. Density-functional theory calculations suggest that direct anharmonic coupling between the excited lattice mode and the electronic structure drives these dynamics, highlighting a new avenue of nonlinear phonon control.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2017
Type:
Article
Affiliation country:
Switzerland