Ultrafast X-ray diffraction probe of terahertz field-driven soft mode dynamics in SrTiO3.
Struct Dyn
; 4(5): 054301, 2017 Sep.
Article
in En
| MEDLINE
| ID: mdl-28503632
ABSTRACT
We use ultrafast X-ray pulses to characterize the lattice response of SrTiO3 when driven by strong terahertz fields. We observe transient changes in the diffraction intensity with a delayed onset with respect to the driving field. Fourier analysis reveals two frequency components corresponding to the two lowest energy zone-center optical modes in SrTiO3. The lower frequency mode exhibits clear softening as the temperature is decreased while the higher frequency mode shows slight temperature dependence.
Full text:
1
Database:
MEDLINE
Language:
En
Journal:
Struct Dyn
Year:
2017
Type:
Article
Affiliation country:
United States