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.

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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