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@ARTICLE{Hoang:637916,
      author       = {Hoang, Le Phuong and Pesquera, David and Hinsley, Gerard N.
                      and Carley, Robert and Mercadier, Laurent and Teichmann,
                      Martin and Unterleutner, Elena Martina and Knez, Daniel and
                      Dienstleder, Martina and Ganguly, Saptam and Asmara, Teguh
                      Citra and Merzoni, Giacomo and Parchenko, Sergii and
                      Schlappa, Justine and Yin, Zhong and Caicedo Roque, José
                      Manuel and Santiso, José and Spasojevic, Irena and Carinan,
                      Cammille and Lee, Tien-Lin and Rossnagel, Kai and
                      Zegenhagen, Jörg and Catalan, Gustau and Vartanyants, Ivan
                      A. and Scherz, Andreas and Mercurio, Giuseppe},
      title        = {{U}ltrafast decoupling of polarization and strain in
                      ferroelectric {B}a{T}i{O}$_3$},
      journal      = {Nature Communications},
      volume       = {16},
      number       = {1},
      issn         = {2041-1723},
      address      = {[London]},
      publisher    = {Springer Nature},
      reportid     = {PUBDB-2025-03906},
      pages        = {7966},
      year         = {2025},
      abstract     = {A fundamental understanding of the interplay between
                      lattice structure, polarization and electrons is pivotal to
                      the optical control of ferroelectrics. The interaction
                      between light and matter enables the remote and wireless
                      control of the ferroelectric polarization on the picosecond
                      timescale, while inducing strain, i.e., lattice deformation.
                      At equilibrium, the ferroelectric polarization is
                      proportional to the strain, and is typically assumed to be
                      so also out of equilibrium. Decoupling the polarization from
                      the strain would remove the constraint of sample design and
                      provide an effective knob to manipulate the polarization by
                      light. Here, upon above-bandgap laser excitation of the
                      prototypical ferroelectric BaTiO$_3$, we induce and measure
                      an ultrafast decoupling between polarization and strain that
                      begins within 350 fs, by softening Ti-O bonds via charge
                      transfer, and lasts for several tens of picoseconds. We show
                      that the ferroelectric polarization out of equilibrium is
                      mainly determined by photoexcited electrons, instead of the
                      strain.},
      cin          = {FS-SXQM / $XFEL_E2_SCS$},
      ddc          = {500},
      cid          = {I:(DE-H253)FS-SXQM-20190201 /
                      $I:(DE-H253)XFEL_E2_SCS-20210408$},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / DFG project G:(GEPRIS)460248799 -
                      DAPHNE4NFDI - DAten aus PHoton- und Neutronen Experimenten
                      für NFDI (460248799) / DFG project G:(GEPRIS)444821420 -
                      Elastische Kontrolle von konkurrierenden Ordnungen in
                      korrelierten Quantenmaterialien (B03) (444821420) / 05K22VK1
                      - Parabolische geschachtelte Spiegeloptik für thermische
                      Neutronen am Dreiachsenspektrometer PUMA (BMBF-05K22VK1)},
      pid          = {G:(DE-HGF)POF4-632 / G:(GEPRIS)460248799 /
                      G:(GEPRIS)444821420 / G:(DE-Ds200)BMBF-05K22VK1},
      experiment   = {EXP:(DE-MLZ)External-20140101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:40858594},
      doi          = {10.1038/s41467-025-63045-6},
      url          = {https://bib-pubdb1.desy.de/record/637916},
}