Influence of the Material Band Structure on Attosecond Many-Body Electron-Electron Interactions in Transition Metals.

ORAL

Abstract

Many-body electron-electron interactions play prominent roles in correlated electron systems. Here we show that by using attosecond pulse trains, we can observe many-body electron-electron interactions that occur on attosecond timescales during photoemission. We extract the time delays associated with photoemission from occupied bands in Ni and Cu into free-electron final states. This allows us to show that photoemission from the $d$ band of Cu is delayed by \textasciitilde 100 attoseconds relative to photoemission from the same band of Ni. We attribute this difference to the fact that the $d$ band in Ni is not fully occupied, resulting in enhanced electron-electron scattering. Finally, we present a unified picture of electron-electron interactions in transition metals across a broad energy range, from \textasciitilde 0.5eV to 40eV.

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Authors

  • Cong Chen

    • JILA, University of Colorado

  • Zhensheng Tao

    • JILA, University of Colorado

  • Adra Carr

    • JILA, University of Colorado

  • Piotr Matyba

    • JILA, University of Colorado

  • Tibor Szilvási

    • University of Wisconsin-Madison

  • Sebastian Emmerich

    • OPTIMAS, University of Kaiserslautern

  • Martin Piecuch

    • OPTIMAS, University of Kaiserslautern

  • Mark Keller

    • NIST, Boulder

  • Dmitriy Zusin

    • JILA, University of Colorado

  • Steffen Eich

    • OPTIMAS, University of Kaiserslautern

  • Markus Rollinger

    • OPTIMAS, University of Kaiserslautern

  • Wenjing You

    • JILA, University of Colorado

  • Stefan Mathias

    • OPTIMAS, University of Kaiserslautern

  • Uwe Thumm

    • Kansas State University

  • Manos Mavrikakis

    • University of Wisconsin-Madison

  • Martin Aeschlimann

    • OPTIMAS, University of Kaiserslautern

  • Peter Oppeneer

    • Uppsala University

  • Henry Kapteyn

    • JILA, University of Colorado

  • Margaret Murnane

    • JILA, University of Colorado