Cyclotron resonance of the magnetic ratchet effect and second harmonic generation in bilayer graphene

Narjes Kheirabadi, Edward McCann, and Vladimir I. Fal'ko
Phys. Rev. B 97, 075415 – Published 13 February 2018

Abstract

We model the magnetic ratchet effect in bilayer graphene in which a dc electric current is produced by an ac electric field of frequency ω in the presence of a steady in-plane magnetic field and inversion-symmetry breaking. In bilayer graphene, the ratchet effect is tunable by an external metallic gate which breaks inversion symmetry. For zero in-plane magnetic field, we show that trigonal warping and inversion-symmetry breaking are able to produce a large dc valley current, but not a nonzero total dc charge current. For the magnetic ratchet in a tilted magnetic field, the perpendicular field component induces cyclotron motion with frequency ωc and we find that the dc current displays cyclotron resonance at ωc=ω, although this peak in the current is actually smaller than its value at ωc=0. Second harmonic generation, however, is greatly enhanced by resonances at ωc=ω and ωc=2ω for which the current is generally much larger than at ωc=0.

  • Figure
  • Figure
  • Received 15 November 2017

DOI:https://doi.org/10.1103/PhysRevB.97.075415

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Narjes Kheirabadi1, Edward McCann1, and Vladimir I. Fal'ko2

  • 1Physics Department, Lancaster University, Lancaster LA1 4YB, United Kingdom
  • 2National Graphene Institute, The University of Manchester, Manchester M13 9PL, United Kingdom

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Issue

Vol. 97, Iss. 7 — 15 February 2018

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