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  • Chen, F.Stanford Linear Accelerator Center (SLAC),Stanford University (author)

Ultrafast terahertz-field-driven ionic response in ferroelectric BaTiO3

  • Article/chapterEnglish2016

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  • 2016

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  • LIBRIS-ID:oai:lup.lub.lu.se:231087c2-6642-4737-8ff2-2370d85cfb43
  • https://lup.lub.lu.se/record/231087c2-6642-4737-8ff2-2370d85cfb43URI
  • https://doi.org/10.1103/PhysRevB.94.180104DOI

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  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • The dynamical processes associated with electric field manipulation of the polarization in a ferroelectric remain largely unknown but fundamentally determine the speed and functionality of ferroelectric materials and devices. Here we apply subpicosecond duration, single-cycle terahertz pulses as an ultrafast electric field bias to prototypical BaTiO3 ferroelectric thin films with the atomic-scale response probed by femtosecond x-ray-scattering techniques. We show that electric fields applied perpendicular to the ferroelectric polarization drive large-amplitude displacements of the titanium atoms along the ferroelectric polarization axis, comparable to that of the built-in displacements associated with the intrinsic polarization and incoherent across unit cells. This effect is associated with a dynamic rotation of the ferroelectric polarization switching on and then off on picosecond time scales. These transient polarization modulations are followed by long-lived vibrational heating effects driven by resonant excitation of the ferroelectric soft mode, as reflected in changes in the c-axis tetragonality. The ultrafast structural characterization described here enables a direct comparison with first-principles-based molecular-dynamics simulations, with good agreement obtained.

Subject headings and genre

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  • Zhu, Y.Argonne National Laboratory (author)
  • Liu, S.University of Pennsylvania,Carnegie Institution for Science (author)
  • Qi, Y.University of Pennsylvania (author)
  • Hwang, H. Y.Massachusetts Institute of Technology (author)
  • Brandt, N. C.Massachusetts Institute of Technology (author)
  • Lu, J.Massachusetts Institute of Technology (author)
  • Quirin, F.University of Duisburg-Essen (author)
  • Enquist, H.Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory(Swepub:lu)fysi-hen (author)
  • Zalden, P.Stanford Linear Accelerator Center (SLAC) (author)
  • Hu, T.Stanford University (author)
  • Goodfellow, J.Stanford University (author)
  • Sher, M. J.Stanford Linear Accelerator Center (SLAC),Stanford University (author)
  • Hoffmann, M. C.Stanford Linear Accelerator Center (SLAC) (author)
  • Zhu, D.Stanford Linear Accelerator Center (SLAC) (author)
  • Lemke, H.Stanford Linear Accelerator Center (SLAC) (author)
  • Glownia, J.Stanford Linear Accelerator Center (SLAC) (author)
  • Chollet, M.Stanford Linear Accelerator Center (SLAC) (author)
  • Damodaran, A. R.University of California, Berkeley (author)
  • Park, J.University of Wisconsin (author)
  • Cai, Z.Argonne National Laboratory (author)
  • Jung, I. W.Argonne National Laboratory (author)
  • Highland, M. J.Argonne National Laboratory (author)
  • Walko, D. A.Argonne National Laboratory (author)
  • Freeland, J. W.Argonne National Laboratory (author)
  • Evans, P. G.University of Wisconsin (author)
  • Vailionis, A.Stanford University (author)
  • Larsson, JörgenLund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)fysi-jla (author)
  • Nelson, K. A.Massachusetts Institute of Technology (author)
  • Rappe, A. M.University of Pennsylvania (author)
  • Sokolowski-Tinten, K.University of Duisburg-Essen (author)
  • Martin, L. W.University of California, Berkeley,Lawrence Berkeley National Laboratory (author)
  • Wen, H.Argonne National Laboratory (author)
  • Lindenberg, A. M.Stanford University,Stanford Linear Accelerator Center (SLAC) (author)
  • Stanford Linear Accelerator Center (SLAC)Stanford University (creator_code:org_t)

Related titles

  • In:Physical Review B94:181098-0121

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