Asymmetric Electron Energy Loss in Drift-Current Biased Graphene

  title={Asymmetric Electron Energy Loss in Drift-Current Biased Graphene},
  author={Filipa R. Prud{\^e}ncio and M{\'a}rio G. Silveirinha},
The electric drift-current bias was recently introduced as a new paradigm to break the Lorentz reciprocity in graphene. Here, we study the impact of the nonreciprocal response in the energy extracted from a beam of swift charges traveling in the vicinity of a graphene sheet with drifting electrons. It is demonstrated that the drift bias leads to an asymmetric electron-energy-loss spectrum that depends on the sign of the charge velocity. It is found that when the drift and electron beam… 
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