4.8 Article

Characterization of photoinduced normal state through charge density wave in superconducting YBa2Cu3O6.67

Journal

SCIENCE ADVANCES
Volume 8, Issue 6, Pages -

Publisher

AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abk0832

Keywords

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Funding

  1. U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-76SF00515]
  2. Korea government (MSIT) [2020-1st-SSS-016]
  3. KAKENHI [19H00647]
  4. National Research Foundation grant - Korea government (MSIT) [2019R1F1A1060295]
  5. National Research Foundation of Korea [2019R1F1A1060295] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
  6. Grants-in-Aid for Scientific Research [19H00647] Funding Source: KAKEN

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Researchers have found that the photoinduced normal state of high-T-c cuprates exhibits similar characteristics to those in equilibrium conditions under magnetic fields, such as the competition between superconductivity and charge density waves.
The normal state of high-T-c cuprates has been considered one of the essential topics in high-temperature superconductivity research. However, compared to the high magnetic field study of it, understanding a photoinduced normal state remains elusive. Here, we explore a photoinduced normal state of YBa2Cu3O6.67 through a charge density wave (CDW) with time-resolved resonant soft x-ray scattering, as well as a high magnetic field x-ray scattering. In the nonequilibrium state where people predict a quenched superconducting state based on the previous optical spectroscopies, we experimentally observed a similar analogy to the competition between superconductivity and CDW shown in the equilibrium state. We further observe that the broken pairing states in the superconducting CuO2 plane via the optical pump lead to nucleation of three-dimensional CDW precursor correlation. Ultimately, these findings provide a critical clue that the characteristics of the photoinduced normal state show a solid resemblance to those under magnetic fields in equilibrium conditions.

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