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Title: Ultrafast X-ray diffraction probe of terahertz field-driven soft mode dynamics in SrTiO 3

We use ultrafast x-ray pulses to characterize the lattice response of SrTiO 3 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 SrTiO 3. Lastly, the lower frequency mode exhibits clear softening as the temperature is decreased while the higher frequency mode shows slight temperature dependence.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [1]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
Publication Date:
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Structural Dynamics
Additional Journal Information:
Journal Volume: 4; Journal Issue: 5; Journal ID: ISSN 2329-7778
Publisher:
American Crystallographic Association/AIP
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1353203

Kozina, M., van Driel, T., Chollet, M., Sato, T., Glownia, J. M., Wandel, S., Radovic, M., Staub, U., and Hoffmann, M. C.. Ultrafast X-ray diffraction probe of terahertz field-driven soft mode dynamics in SrTiO3. United States: N. p., Web. doi:10.1063/1.4983153.
Kozina, M., van Driel, T., Chollet, M., Sato, T., Glownia, J. M., Wandel, S., Radovic, M., Staub, U., & Hoffmann, M. C.. Ultrafast X-ray diffraction probe of terahertz field-driven soft mode dynamics in SrTiO3. United States. doi:10.1063/1.4983153.
Kozina, M., van Driel, T., Chollet, M., Sato, T., Glownia, J. M., Wandel, S., Radovic, M., Staub, U., and Hoffmann, M. C.. 2017. "Ultrafast X-ray diffraction probe of terahertz field-driven soft mode dynamics in SrTiO3". United States. doi:10.1063/1.4983153. https://www.osti.gov/servlets/purl/1353203.
@article{osti_1353203,
title = {Ultrafast X-ray diffraction probe of terahertz field-driven soft mode dynamics in SrTiO3},
author = {Kozina, M. and van Driel, T. and Chollet, M. and Sato, T. and Glownia, J. M. and Wandel, S. and Radovic, M. and Staub, U. and Hoffmann, M. C.},
abstractNote = {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. Lastly, the lower frequency mode exhibits clear softening as the temperature is decreased while the higher frequency mode shows slight temperature dependence.},
doi = {10.1063/1.4983153},
journal = {Structural Dynamics},
number = 5,
volume = 4,
place = {United States},
year = {2017},
month = {5}
}