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Ultrafast electronic state conversion at room temperature utilizing hidden state in cuprate ladder system

Author

Listed:
  • R. Fukaya

    (CREST, JST
    Tokyo Institute of Technology
    Present address: Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan)

  • Y. Okimoto

    (Tokyo Institute of Technology)

  • M. Kunitomo

    (Tokyo Institute of Technology)

  • K. Onda

    (Interactive Research Center of Science, Tokyo Institute of Technology
    PRESTO, JST)

  • T. Ishikawa

    (Tokyo Institute of Technology)

  • S. Koshihara

    (CREST, JST
    Tokyo Institute of Technology)

  • H. Hashimoto

    (Tohoku University)

  • S. Ishihara

    (CREST, JST
    Tohoku University)

  • A. Isayama

    (Materials and Structures Laboratory, Tokyo Institute of Technology)

  • H. Yui

    (Materials and Structures Laboratory, Tokyo Institute of Technology)

  • T. Sasagawa

    (Materials and Structures Laboratory, Tokyo Institute of Technology)

Abstract

Photo-control of material properties on femto- (10−15) and pico- (10−12) second timescales at room temperature has been a long-sought goal of materials science. Here we demonstrate a unique ultrafast conversion between the metallic and insulating state and the emergence of a hidden insulating state by tuning the carrier coherence in a wide temperature range in the two-leg ladder superconductor Sr14-xCaxCu24O41 through femtosecond time-resolved reflection spectroscopy. We also propose a theoretical scenario that can explain the experimental results. The calculations indicate that the holes injected by the ultrashort light reduce the coherence among the inherent hole pairs and result in suppression of conductivity, which is opposite to the conventional photocarrier-doping mechanism. By using trains of ultrashort laser pulses, we successively tune the carrier coherence to within 1 picosecond. Control of hole-pair coherence is shown to be a realistic strategy for tuning the electronic state on ultrafast timescales at room temperature.

Suggested Citation

  • R. Fukaya & Y. Okimoto & M. Kunitomo & K. Onda & T. Ishikawa & S. Koshihara & H. Hashimoto & S. Ishihara & A. Isayama & H. Yui & T. Sasagawa, 2015. "Ultrafast electronic state conversion at room temperature utilizing hidden state in cuprate ladder system," Nature Communications, Nature, vol. 6(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9519
    DOI: 10.1038/ncomms9519
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