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Title: Enhanced charge density wave coherence in a light-quenched, high-temperature superconductor

Journal Article · · Science
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  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); SLAC National Accelerator Laboratory (SLAC)
  2. Univ. of British Columbia, Vancouver, BC (Canada); Institut National de la Recherche Scientifique, Varennes (Canada)
  3. Yale Univ., New Haven, CT (United States); Univ. of California, Davis, CA (United States)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Univ. of British Columbia, Vancouver, BC (Canada)
  6. Canadian Light Source, Saskatoon (Canada)
  7. Arizona State Univ., Tempe, AZ (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  8. Univ. of Waterloo, ON (Canada)
  9. North Carolina State Univ., Raleigh, NC (United States)
  10. Università Cattolica del Sacro Cuore, Brescia (Italy)

Superconductivity and charge density waves (CDWs) are competitive, yet coexisting, orders in cuprate superconductors. To understand their microscopic interdependence, a probe capable of discerning their interaction on its natural length and time scale is necessary. We use ultrafast resonant soft x-ray scattering to track the transient evolution of CDW correlations in YBa2Cu3O6+x after the quench of superconductivity by an infrared laser pulse. We observe a nonthermal response of the CDW order characterized by a near doubling of the correlation length within ≈1 picosecond of the superconducting quench. Our results are consistent with a model in which the interaction between superconductivity and CDWs manifests inhomogeneously through disruption of spatial coherence, with superconductivity playing the dominant role in stabilizing CDW topological defects, such as discommensurations.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
British Columbia Knowledge Development Fund; Canada Foundation for Innovation; Canadian Institutes of Health Research; National Research Council Canada; National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE Office of Science (SC), High Energy Physics (HEP); Universität Hamburg
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515
OSTI ID:
1870707
Journal Information:
Science, Journal Name: Science Journal Issue: 6595 Vol. 376; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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