期刊
PHYSICAL REVIEW B
卷 90, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.184514
关键词
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资金
- LCLS
- University of Hamburg through the BMBF [FSP 301]
- Center for Free Electron Laser Science (CFEL)
- European Research Council under the European Union's Seventh Framework Programme (FP7)/ERC [319286]
- Department of Energy, Division of Materials Science and Engineering [DE-AC02-98CH10886]
- Stanford University, through the Stanford Institute for Materials Energy Sciences (SIMES)
- Lawrence Berkeley National Laboratory (LBNL) [DE-AC02-05CH11231]
We use femtosecond resonant soft x-ray diffraction to measure the optically stimulated ultrafast changes of charge-density wave correlations in underdoped YBa2Cu3O6.6. We find that when coherent interlayer transport is enhanced by optical excitation of the apical oxygen distortions, at least 50% of the in-plane charge-density wave order is melted. These results indicate that charge ordering and superconductivity may be competing up to the charge ordering transition temperature, with the latter becoming a hidden phase that is accessible only by nonlinear phonon excitation.
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