Ultrafast X-ray diffraction probe of terahertz field-driven soft mode dynamics in SrTiO3.
- Kozina M Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
- van Driel T Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
- Chollet M Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
- Sato T Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
- Glownia JM Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
- Wandel S Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
- Radovic M Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.
- Staub U Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
- Hoffmann MC
- 2017-05-16
Published in:
- Structural dynamics (Melville, N.Y.). - 2017
English
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.
- Language
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- English
- Open access status
- gold
- Identifiers
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- DOI 10.1063/1.4983153
- PMID 28503632
- Persistent URL
- https://sonar.ch/global/documents/139709
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