Ultrafast quenching of electron-boson interaction and superconducting gap in a cuprate superconductor

ORAL

Abstract

Ultrafast spectroscopy makes it possible to track similarities and correlations that are not evident near equilibrium. Time- and angle-resolved photoemission measurements on cuprate high-temperature superconductor reveals that below the superconductor's critical temperature, ultrafast excitations trigger a synchronous decrease of electron self-energy and superconducting gap. In contrast, electron-boson coupling is unresponsive to ultrafast excitations above the superconductor's critical temperature and in the metallic state of a related material. These findings open a new pathway for studying transient self-energy and correlation effects in solids.

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Authors

  • Wentao Zhang

    • Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

  • Choonkyu Hwang

    • Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

  • Christopher Smallwood

    • Department of Physics, University of California, Berkeley, California 94720, USA

  • Tristan Miller

    • Department of Physics, University of California, Berkeley, California 94720, USA

  • Gregory Affeldt

    • Department of Physics, University of California, Berkeley, California 94720, USA

  • Koshi Kurashima

    • Department of Applied Physics,Tohoku University, Sendai 980-8579, Japan

  • Chris Jozwiak

    • Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

  • Hiroshi Eisaki

    • Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, Ibaraki 305-8568, Japan

  • Tadashi Adachi

    • Department of Engineering and Applied Sciences, Sophia University, Tokyo 102-8554, Japan

  • Yoji Koike

    • Department of Applied Physics,Tohoku University, Sendai 980-8579, Japan

  • Dung-Hai Lee

    • Department of Physics, University of California, Berkeley, California 94720, USA

  • Lanzara Alessandra

    • Department of Physics, University of California, Berkeley, California 94720, USA