Open AccessТерагерцовая фотопроводимость в графене в магнитном поле
Author(s) -
Ю.Б. Васильев,
С. Н. Новиков,
Sergey Danilov,
С. Д. Ганичев
Publication year - 2020
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2020.04.49146.9322
Subject(s) - terahertz radiation , photoconductivity , magnetic field , electron , materials science , signal (programming language) , condensed matter physics , scattering , relaxation (psychology) , optoelectronics , amplitude , electron scattering , physics , optics , psychology , social psychology , quantum mechanics , computer science , programming language
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.