Characterization of photoinduced normal state through charge density wave in superconducting YBa$_2$Cu$_3$O$_{6.67}$

H. Jang; S. Song; T. Kihara; Y. Liu; S. -J. Lee; S. -Y. Park; M. Kim; H. -D. Kim; G. Coslovich; S. Nakata; Y. Kubota; I. Inoue; K. Tamasaku; M. Yabashi; H. Lee; C. Song; H. Nojiri; B. Keimer; C. -C. Kao; J. -S. Lee

doi:10.1126/sciadv.abk0832

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arXiv · 2202.04784

Characterization of photoinduced normal state through charge density wave in superconducting YBa$_2$Cu$_3$O$_{6.67}$

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Abstract

The normal state of high-Tc cuprates has been considered one of the essential topics in high-temperature superconductivity research. However, compared to the high magnetic fields study of it, understanding a photoinduced normal state remains elusive. Here, we explore a photoinduced normal state of YBa$_2$Cu$_3$O$_{6.67}$ (YBCO) 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 non-equilibrium state in which 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, revealing that the photoinduced CDW is similar to phenomena shown under magnetic fields. 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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H. Jang, S. Song, T. Kihara, Y. Liu, S. -J. Lee, S. -Y. Park, M. Kim, H. -D. Kim, G. Coslovich, S. Nakata, Y. Kubota, I. Inoue, K. Tamasaku, M. Yabashi, H. Lee, C. Song, H. Nojiri, B. Keimer, C. -C. Kao, J. -S. Lee. 2022-02-10. Characterization of photoinduced normal state through charge density wave in superconducting YBa$_2$Cu$_3$O$_{6.67}$. https://doi.org/10.1126/sciadv.abk0832

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