Rights statement: ©2018 American Physical Society
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Rights statement: ©2018 American Physical Society
Final published version, 425 KB, PDF document
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Cyclotron resonance of the magnetic ratchet effect and second harmonic generation in bilayer graphene
AU - Kheirabadi, Narjes
AU - McCann, Edward
AU - Falko, Vladimir
N1 - ©2018 American Physical Society
PY - 2018/2/15
Y1 - 2018/2/15
N2 - 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 non-zero 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.
AB - 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 non-zero 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.
KW - Magnetotransport
KW - Optoelectronics
KW - Bilayer films
KW - Graphene
KW - Tight-binding model
U2 - 10.1103/PhysRevB.97.075415
DO - 10.1103/PhysRevB.97.075415
M3 - Journal article
VL - 97
JO - Physical review B
JF - Physical review B
SN - 1098-0121
IS - 7
M1 - 075415
ER -