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Melting of charge stripes in vibrationally driven La(1.875)Ba(0.125)CuO4: assessing the respective roles of electronic and lattice order in frustrated superconductors.
Först, M; Tobey, R I; Bromberger, H; Wilkins, S B; Khanna, V; Caviglia, A D; Chuang, Y-D; Lee, W S; Schlotter, W F; Turner, J J; Minitti, M P; Krupin, O; Xu, Z J; Wen, J S; Gu, G D; Dhesi, S S; Cavalleri, A; Hill, J P.
Afiliación
  • Först M; Max-Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany.
  • Tobey RI; Zernike Institute for Advanced Materials, University of Groningen, 9747AG Groningen, Netherlands.
  • Bromberger H; Max-Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany.
  • Wilkins SB; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
  • Khanna V; Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United Kingdom and Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom.
  • Caviglia AD; Max-Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany.
  • Chuang YD; Advanced Light Source, Lawrence Berkeley Laboratory, Berkeley 94720, California, USA.
  • Lee WS; SIMES, SLAC National Accelerator Laboratory and Stanford University, Menlo Park 94025, California, USA.
  • Schlotter WF; Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park 94025, California, USA.
  • Turner JJ; Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park 94025, California, USA.
  • Minitti MP; Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park 94025, California, USA.
  • Krupin O; European XFEL GmbH, 22761 Hamburg, Germany.
  • Xu ZJ; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
  • Wen JS; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
  • Gu GD; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
  • Dhesi SS; Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom.
  • Cavalleri A; Max-Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany and Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United Kingdom and Center for Free Electron Laser Science and University of Hamburg, 22761 Hamburg, Germany.
  • Hill JP; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
Phys Rev Lett ; 112(15): 157002, 2014 Apr 18.
Article en En | MEDLINE | ID: mdl-24785066
ABSTRACT
We report femtosecond resonant soft x-ray diffraction measurements of the dynamics of the charge order and of the crystal lattice in nonsuperconducting, stripe-ordered La1.875Ba0.125CuO4. Excitation of the in-plane Cu-O stretching phonon with a midinfrared pulse has been previously shown to induce a transient superconducting state in the closely related compound La1.675Eu0.2Sr0.125CuO4. In La1.875Ba0.125CuO4, we find that the charge stripe order melts promptly on a subpicosecond time scale. Surprisingly, the low temperature tetragonal (LTT) distortion is only weakly reduced, reacting on significantly longer time scales that do not correlate with light-induced superconductivity. This experiment suggests that charge modulations alone, and not the LTT distortion, prevent superconductivity in equilibrium.
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Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2014 Tipo del documento: Article
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Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2014 Tipo del documento: Article