Driving collective current oscillations using light: The time-dependent GW approach

ORAL

Abstract

It is well known that electron-electron interactions generate longitudinal collective charge excitations known as plasmons, which correspond to resonances in the electron density-density response function. In this work, using the non-equilibrium real-time GW approach that includes the full two-time self-energy, we show that the current-current interactions can drive a different kind of collective excitation. These transverse collective current excitations lead to resonances in the current-current response function. We also propose routes for their experimental detection.

* We acknowledge support from the Swedish Research Council (VR), the Knut and Alice Wallenberg Foundation, the Swedish Foundation for Strategic Research (SSF), the Swedish Energy Agency (Energimyndigheten), ERC (synergy grant FASTCORR, project 854843), eSSENCE, and STandUPP. We also would like to acknowledge the Swedish National Infrastructure for Computing (SNIC) for computational support.

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Presenters

  • Chin Shen Ong

    Uppsala University

Authors

  • Chin Shen Ong

    Uppsala University

  • Denis Golez

    Jozef Stefan Institute, Jožef Stefan Institute and Faculty of Mathematics and Physics, University of Ljubljana, Jožef Stefan Institute

  • Angel Rubio

    Max Planck Institute for the Structure & Dynamics of Matter, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Institute for the Structure &, Max Planck Institute for the Structure & Dynamics of Matter; Center for Computational Quantum Physics, Flatiron Institute, Center for Computational Quantum Physics, Flatiron Institute, Max Planck Institute for the Structure and Dynamics of Matter - Flatiron Institute, Max Planck Institute for Structure and Dynamics of Matter

  • Olle Eriksson

    Uppsala University

  • Hugo U Strand

    Örebro University, School of Science and Technology, Örebro University