Quantum magneto-oscillations in the ac conductivity of disordered graphene

Anisotropic AC conductivity of strained graphene.

The density of states and the AC conductivity of graphene under uniform strain are calculated using a new Dirac Hamiltonian that takes into account the main three ingredients that change the electronic properties of strained graphene: the real displacement of the Fermi energy, the reciprocal lattice strain and the changes in the overlap of atomic orbitals. Our simple analytical expressions for ...

AC conductivity parameters of graphene derived from THz etalon transmittance.

THz frequency-domain transmittance measurements were carried out on chemical-vapor-deposited (CVD) graphene films transferred to high-resistivity silicon substrates, and packaged as back-gated graphene field effect transistors (G-FETs). The graphene AC conductivity σ(ω), both real and imaginary parts, is determined between 0.2 and 1.2 THz from the transmittance using the transmission matrix met...

Negative terahertz conductivity in disordered graphene bilayers with population inversion

Quantum Oscillations in Graphene in the Presence of Disorder

We present a theoretical study of magnetotransport in a graphene monolayer taking into account the effects of disorder. The density of states (DOS) and conductivity found for graphene and compared to those found in dimensional electron gas (2DEG) or normal metals. The self-energy due to impurities is calculated self-consistently in Born approximation, and depends strongly on the frequency and f...

Numerical studies of non - Drude ac - conductivity and infrared magneto - optics in ( Ga , Mn ) As

Submitted for the MAR13 Meeting of The American Physical Society Numerical studies of non-Drude ac-conductivity and infrared magneto-optics in (Ga,Mn)As HUAWEI GAO, JAIRO SINOVA, Department of Physics, Texas A&M University — Optical absorption experiments on (III,Mn)V diluted magnetic semiconductors (DMS’s) show that the ac-conductivity has nonDrude behavior at low frequency. STM study show man...