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Title: Nonlinear electron-phonon coupling in doped manganites

Here, we employ time-resolved resonant x-ray diffraction to study the melting of charge order and the associated insulator-to-metal transition in the doped manganite Pr 0.5Ca 0.5MnO 3 after resonant excitation of a high-frequency infrared-active lattice mode. We find that the charge order reduces promptly and highly nonlinearly as function of excitation fluence. Density-functional theory calculations suggest that direct anharmonic coupling between the excited lattice mode and the electronic structure drives these dynamics, highlighting a new avenue of nonlinear phonon control.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [5] ;  [6] ;  [7] ;  [7] ;  [1] ;  [1] ;  [3]
  1. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  2. Max-Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); ETH Zurich, Zurich (Switzerland)
  3. Max-Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Center for Free Electron Laser Science, Hamburg (Germany)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States); Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  6. RIKEN Center for Emergent Matter Science, Wako (Japan)
  7. RIKEN Center for Emergent Matter Science, Wako (Japan); Univ. of Tokyo, Tokyo (Japan)
Publication Date:
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 24; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1369341
Alternate Identifier(s):
OSTI ID: 1364080