Observation of Terahertz-Induced Magnetooscillations in Graphene
Name
2005.01118.pdf
Description
Submitted version
Size
1.77 MB
Format
Adobe PDF
Checksum (MD5)
c45413f9b6653362b0ac5feee4fbce19
Author(s)
Mönch, Erwin
Bandurin, Denis A
Dmitriev, Ivan A
Phinney, Isabelle Y
Yahniuk, Ivan
Taniguchi, Takashi
Watanabe, Kenji
Jarillo-Herrero, Pablo
Ganichev, Sergey D
Date Issued
2020
Journal
Nano Letters
Publisher
American Chemical Society (ACS)
Version
Original manuscript
Abstract
When high-frequency radiation is incident upon graphene subjected to a perpendicular magnetic field, graphene absorbs incident photons by allowing transitions between nearest Landau levels that follow strict selection rules dictated by angular momentum conservation. Here, we show a qualitative deviation from this behavior in high-quality graphene devices exposed to terahertz (THz) radiation. We demonstrate the emergence of a pronounced THz-driven photoresponse, which exhibits low-field magnetooscillations governed by the ratio of the frequency of the incoming radiation and the quasiclassical cyclotron frequency. We analyze the modifications of generated photovoltage with the radiation frequency and carrier density and demonstrate that the observed photoresponse shares a common origin with microwave-induced resistance oscillations discovered in GaAs-based heterostructures; however, in graphene it appears at much higher frequencies and persists above liquid nitrogen temperatures. Our observations expand the family of radiation-driven phenomena in graphene, paving the way for future studies of nonequilibrium electron transport.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1021/acs.nanolett.0c01918
