Effective mass of electron in monolayer graphene: Electron-phonon interaction
Author
Tiras, E.
Ardali, S.
Tiras, T.
Arslan, E.
Cakmakyapan, S.
Kazar, O.
Hassan, J.
Janzén, E.
Özbay, Ekmel
Date
2013-01-25Source Title
Journal of Applied Physics
Print ISSN
0021-8979
Publisher
AIP Publishing LLC
Volume
113
Issue
4
Language
English
Type
ArticleItem Usage Stats
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Abstract
Shubnikov-de Haas (SdH) and Hall effect measurements performed in a temperature range between 1.8 and 275 K, at an electric field up to 35 kV m -1 and magnetic fields up to 11 T, have been used to investigate the electronic transport properties of monolayer graphene on SiC substrate. The number of layers was determined by the use of the Raman spectroscopy. The carrier density and in-plane effective mass of electrons have been obtained from the periods and temperature dependencies of the amplitude of the SdH oscillations, respectively. The effective mass is in good agreement with the current results in the literature. The two-dimensional (2D) electron energy relaxations in monolayer graphene were also investigated experimentally. The electron temperature (Te) of hot electrons was obtained from the lattice temperature (TL) and the applied electric field dependencies of the amplitude of SdH oscillations. The experimental results for the electron temperature dependence of power loss indicate that the energy relaxation of electrons is due to acoustic phonon emission via mixed unscreened piezoelectric interaction and deformation-potential scattering.
Keywords
Acoustic phononsEffective mass
Electric field dependencies
Electron energies
Electronic transport properties
Energy relaxation
Hall effect measurement
Lattice temperatures
Number of layers
Power-losses
Shubnikov-de Haas
SiC substrates
Temperature dependence
Temperature dependencies
Temperature range
Electric fields
Electron temperature
Monolayers
Raman spectroscopy
Semiconducting indium compounds
Silicon carbide
Transport properties
Graphene
Permalink
http://hdl.handle.net/11693/21109Published Version (Please cite this version)
http://dx.doi.org/10.1063/1.4789385Collections
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