論文

査読有り
2021年7月

Light-induced enhancement of superconductivity in iron-based superconductor FeSe0.5Te0.5

Communications Physics
  • Kazuki Isoyama
  • ,
  • Naotaka Yoshikawa
  • ,
  • Kota Katsumi
  • ,
  • Jeremy Wong
  • ,
  • Naoki Shikama
  • ,
  • Yuki Sakishita
  • ,
  • Fuyuki Nabeshima
  • ,
  • Atsutaka Maeda
  • ,
  • Ryo Shimano

4
1
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/s42005-021-00663-8
出版者・発行元
Springer Science and Business Media LLC

<title>Abstract</title>Illumination of light on matter normally causes heating and destroys the ordered ground states. Despite this common understanding, recent advances in ultrafast light sources have enabled the non-thermal control of quantum phases. Here, we report the light-induced enhancement of superconductivity in a thin film of an iron chalcogenide FeSe0.5Te0.5, which exhibits multiple quantum condensates associated with the multi-orbital character. Upon the photoexcitation, we observed a transient increase of the superfluid density as indicated by the optical conductivity in the frequency range of superconducting gaps. The light-induced enhancement of superconductivity is further corroborated by the photoinduced enhancement of terahertz third harmonic generation, which is accounted for by the Higgs mode response. The ultrafast dynamics of two superfluid components revealed by frequency- and time-resolved terahertz measurements indicate the interplay between the condensates through the interband Cooper pairings while suggesting the potential tunability of the pairing interaction by light in the ultrafast timescale.

リンク情報
DOI
https://doi.org/10.1038/s42005-021-00663-8
URL
http://www.nature.com/articles/s42005-021-00663-8.pdf
URL
http://www.nature.com/articles/s42005-021-00663-8
ID情報
  • DOI : 10.1038/s42005-021-00663-8
  • eISSN : 2399-3650

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