MAGNETO-SPECTROSCOPY OF EPITAXIAL GRAPHENE

2007 ◽  
Vol 21 (08n09) ◽  
pp. 1145-1154 ◽  
Author(s):  
M. L. SADOWSKI ◽  
G. MARTINEZ ◽  
M. POTEMSKI ◽  
C. BERGER ◽  
W. A. DE HEER
Keyword(s):  
Magnetic Field ◽  
Cyclotron Resonance ◽  
Far Infrared ◽  
Theoretical Models ◽  
Epitaxial Graphene ◽  
Landau Levels ◽  
Perpendicular Magnetic Field ◽  
Dirac Fermions ◽  
Optical Transitions ◽  
Interband Transitions

We present a far infrared investigation of the optical transitions in epitaxial graphene subjected to a perpendicular magnetic field. Cyclotron-resonance-like transitions between adjacent electron Landau levels are observed, as well as interband transitions. The results are discussed in terms of existing theoretical models of Dirac fermions in graphene, and the relevant optical selection rules.

scholarly journals Investigation of Magneto-phonon Resonance in Graphene Monolayers

2017 ◽  
Vol 33 (4) ◽  
Author(s):  
Bui Dinh Hoi
Keyword(s):  
Magnetic Field ◽  
Linear Response ◽  
Resonant Scattering ◽  
Linear Response Theory ◽  
Landau Levels ◽  
Effect Of Temperature ◽  
Perpendicular Magnetic Field ◽  
Dirac Fermions ◽  
Deformation Potential ◽  
The Magnetic Field

In this work, utilising the linear response theory we calculate the magneto conductivity (MC) in graphene monolayers, subjected to a static perpendicular magnetic field. The interaction of Dirac fermions with optical phonon via deformation potential is taken into account at high temperature. The dependence of the MC on the magnetic field shows resonant peaks that describe transitions of electrons between Landau levels via the resonant scattering with optical phonons. The effect of temperature on the MC is also obtained and discussed.

THEORY OF MULTIPLE EXCITONIC PEAKS IN THE LUMINESCENCE SPECTRA OF DOPED QUANTUM WELLS IN A MAGNETIC FIELD

1993 ◽  
Vol 07 (19) ◽  
pp. 3435-3447 ◽  
Author(s):  
YURY M. VILK ◽  
ANDREI E. RUCKENSTEIN ◽  
STEFAN SCHMITT-RINK
Keyword(s):  
Magnetic Field ◽  
Quantum Wells ◽  
Oscillator Strength ◽  
Chemical Potential ◽  
Landau Levels ◽  
Luminescence Spectra ◽  
Perpendicular Magnetic Field ◽  
Coulomb Coupling ◽  
Hartree Fock ◽  
Good Agreement

We report calculations of the luminescence spectra of doped quantum wells in a perpendicular magnetic field. We use the variational Hartree-Fock approximation and include Coulomb coupling of different Landau levels to all orders. In the case of localized holes we obtain multiple excitonic peaks with an oscillator strength which increases towards the chemical potential, in good agreement with recent experiments.

CYCLOTRON RESONANCE IN COUPLED BILAYERS IN HIGH MAGNETIC FIELDS

2007 ◽  
Vol 21 (08n09) ◽  
pp. 1589-1593
Author(s):  
A. GÜRTLER ◽  
U. ZEITLER ◽  
J. C. MAAN ◽  
D. REUTER ◽  
A. D. WIECK
Keyword(s):  
Magnetic Field ◽  
Tilt Angle ◽  
Cyclotron Resonance ◽  
Far Infrared ◽  
Laser Wavelength ◽  
Double Quantum ◽  
High Magnetic Fields ◽  
Strongly Coupled ◽  
Double Quantum Well ◽  
The Magnetic Field

We present far-infrared cyclotron resonance measurements on a strongly coupled symmetric GaAs/GaAlAs double quantum well sample. Cyclotron resonance is measured at several discrete wavelengths and tilt angles of the sample with respect to the magnetic field. The width and strength of the resonance peaks depend strongly on the tilt angle and the laser wavelength, demonstrating the complexity of this system.

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