Ultrafast x-ray diffraction probe of terahertz field-driven soft mode dynamics

Autor:	Kozina, M., van Driel, T., Chollet, M., Sato, T., Glownia, J. M., Wandel, S., Radovic, M., Staub, U., Hoffmann, M. C.
Rok vydání:	2017
Předmět:	Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
Popis:	We use ultrafast x-ray pulses to characterize the lattice response of SrTiO3 when driven by strong terahertz (THz) 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. Comment: 15 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1703.09818 Zobrazit plný text záznamu View this record from Arxiv