1.
Phys Rev Lett
; 108(9): 097401, 2012 Mar 02.
Artículo
en Inglés
| MEDLINE
| ID: mdl-22463665
RESUMEN
The ferroelectric soft mode in a SrTiO(3) thin film was impulsively driven to a large amplitude using intense picosecond terahertz pulses. As the terahertz electric field increased, the soft-mode absorption peak exhibited blueshifting and spectral narrowing. A classical anharmonic oscillator model suggests that the induced displacement is comparable to that of the ferroelectric phase transition. The spectral narrowing indicates that the displacement exceeds that induced by any inhomogeneities in the film, demonstrating that the method can be used to explore intrinsic quartic anharmonicity.
2.
Kango Gijutsu
; 26(7): 931-5, 1980 May.
Artículo
en Japonés
| MEDLINE
| ID: mdl-6900724