Higgs-like modes in two-dimensional spatially indirect exciton condensates

Academic Article

Abstract

  • Higgs-like modes in condensed-matter physics have drawn attention because of analogies to the Higgs bosons of particle physics. Here we use a microscopic time-dependent mean-field theory to study the collective mode spectra of two-dimensional spatially indirect exciton (electron-hole pair) condensates, focusing on the Higgs-like modes, i.e., those that have a large weight in electron-hole pair amplitude response functions. We find that in the low exciton density (Bose-Einstein condensate) limit, the dominant Higgs-like modes of spatially indirect exciton condensates correspond to adding electron-hole pairs that are orthogonal to the condensed pair state. We comment on the previously studied Higgs-like collective excitations of superconductors in light of this finding.
  • Authors

    Published In

  • Physical Review B  Journal
  • Digital Object Identifier (doi)

    Author List

  • Xue F; Wu F; MacDonald AH
  • Volume

  • 102
  • Issue

  • 7