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Published in

American Association for the Advancement of Science, Science Advances, 6(8), 2022

DOI: 10.1126/sciadv.abk0832

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Characterization of photoinduced normal state through charge density wave in superconducting YBa <sub>2</sub> Cu <sub>3</sub> O <sub>6.67</sub>

This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

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 YBa 2 Cu 3 O 6.67 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 CuO 2 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.