Terahertz Photoconductivity in Graphene in a Magnetic Field

Terahertz Photoconductivity in Graphene in a Magnetic Field

The terahertz photoconductivity in epitaxial graphene grown on SiC substrates is investigated in a magnetic field. The magnetic-field dependence of the photoresponse signal amplitude is examined at different electron densities, bias currents, and terahertz radiation intensities. The experimental res...

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Veröffentlicht in:Semiconductors (Woodbury, N.Y.) N.Y.), 2020-04, Vol.54 (4), p.465-470
Hauptverfasser: Vasiliev, Yu. B., Novikov, S. N., Danilov, S. N., Ganichev, S. D.
Format: Artikel
Sprache:eng
Schlagworte:
Carbon Systems
Electric waves
Electromagnetic radiation
Electromagnetic waves
Electrons
Epitaxial growth
Epitaxy
Graphene
Graphite
Magnetic fields
Magnetic Materials
Magnetism
Photoconductivity
Physics
Physics and Astronomy
Relaxation time
Silicon substrates
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Zusammenfassung:The terahertz photoconductivity in epitaxial graphene grown on SiC substrates is investigated in a magnetic field. The magnetic-field dependence of the photoresponse signal amplitude is examined at different electron densities, bias currents, and terahertz radiation intensities. The experimental results are explained well by a photoconductivity mechanism based on the heating of electrons by terahertz radiation. A strong increase in the photoconductivity signal with increasing magnetic field caused by an increase in the relaxation time due to the suppression of electron-electron scattering is observed.
ISSN:1063-7826
1090-6479
DOI:10.1134/S106378262004020X