Ultrafast Momentum-resolved Gap and Quasiparticle Dynamics in Bi2212

ORAL

Abstract

Time- and angle-resolved photoemission spectroscopy (trARPES) is a direct and multifaceted probe of electron dynamics in crystalline solids. In cuprate high-temperature superconductors, it holds promise for understanding the interactions potentially linking superconductivity, charge density waves, and antiferromagnetism, which occur in close proximity in the cuprate phase diagram. We have used trARPES to measure the nonequilibrium gap and quasiparticle relaxation dynamics in Bi2212 while varying a range of dopings, temperatures, pump fluences, binding energies, and crystal momenta. Measurements reveal distinct signatures corresponding to superconducting and non-superconducting ordering tendencies, with potential indications of phase coexistence and/or competition.

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Authors

  • Christopher Smallwood

    UC Berkeley, LBNL

  • Wentao Zhang

    Lawrence Berkeley Natl Lab, UC Berkeley, LBNL

  • Tristan Miller

    UC Berkeley, LBNL

  • Greg Affeldt

    UC Berkeley, LBNL

  • Chris Jozwiak

    LBNL

  • Hiroshi Eisaki

    Electronics and Photonics Research Institute, AIST, Japan, National Institute of Advanced Industrial Science and Technology, AIST Tsukuba

  • Ashvin Vishwanath

    University of California, Berkeley, Univ of California - Berkeley, UC Berkeley, LBNL, UC Berkeley, University of California Berkeley

  • Dung-Hai Lee

    UC Berkeley, LBNL, University of California, Berkeley

  • Alessandra Lanzara

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