Tracking Cooper Pair Formation in a Cuprate Superconductor: An Ultrafast ARPES Study

ORAL

Abstract

A basic mystery in high temperature superconductivity is the process that drives quasiparticles to form Cooper pairs, the fundamental charge carriers in any superconductor. We use time- and angle-resolved photoemission spectroscopy (TR-ARPES) to measure the relaxation dynamics of low energy excitations in the optimally doped cuprate superconductor Bi-2212. Results are discussed within the context of the Rothwarf-Taylor model of quasiparticle recombination.

–

Authors

  • Christopher Smallwood

    • Department of Physics, UC Berkeley; Materials Science Division, LBNL

  • James Hinton

    • UC Berkeley, LBNL
    • Department of Physics, UC Berkeley; Materials Science Division, LBNL

  • Chris Jozwiak

    • Advanced Light Source, LBNL

  • Wentao Zhang

    • Materials Science Division, LBNL

  • Jake Koralek

    • Materials Science Division, LBNL

  • Hiroshi Eisaki

    • AIST
    • National Institute of Advanced Industrial Science and Technology, Japan
    • Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan
    • National Institute of Advanced Industrial and Science Technology
    • Institute of Advanced Industrial Science and Technology
    • Nanoelectronics Research Institute, National Institute of Advanced Industrial Science and technology

  • Dung-Hai Lee

    • Department of Physics, UC Berkeley; Materials Science Division, LBNL

  • Joseph Orenstein

    • University of California, Berkeley
    • UC Berkeley, LBNL
    • UC Berkeley and Lawrence Berkeley National Laboratory
    • Department of Physics, UC Berkeley; Materials Science Division, LBNL
    • University of California, Berkeley and Lawrence Livermore National Laboratory

  • Alessandra Lanzara

    • University of California, Berkeley / Lawrence Berkeley National Lab
    • University California, Berkeley and Material Sciences Division, Lawrence Berkeley National Laboratory
    • Department of Physics, UC Berkeley; Materials Science Division, LBNL
    • Department of Physics, University of California, Berkeley, CA 94720, USA