搜索结果: 46-60 共查到“理学 graphene”相关记录121条 . 查询时间(0.015 秒)
Molecule States in a Gate Tunable Graphene Double Quantum Dot
Molecule States Gate Tunable Graphene Double Quantum Dot
2010/11/25
We have measured a graphene double quantum dot device with multiple electrostatic gates that
are used to enhance control to investigate it. At low temperatures the transport measurements
reveal hone...
Coulomb interaction in graphene: Relaxation rates and transport
Coulomb interaction in graphene Relaxation rates transport
2010/11/25
We analyze the inelastic electron-electron scattering in undoped graphene within the Keldysh
diagrammatic approach. We demonstrate that finite temperature strongly affects the screening
properties o...
We present a technique to fabricate tunnel junctions between graphene and Al and Cu, with a Si back gate, as well as a simple theory of tunneling between a metal and graphene.
Graphene, a hexagonal sheet of sp2-bonded carbon atoms, has extraordinary properties which hold immense promise for future nanoelectronic applications. Unfor-tunately, the popular preparation methods ...
Carrier heating and high-order harmonics generation in doped graphene by a strong ac electric field
Carrier heating high-order harmonics generation strong ac electric field
2010/11/25
The nonlinear response of electrons (holes) in doped graphene on ac pumping is concidered the-
oretically for the frequency region above the energy relaxation rate but below the momentum and
carrier...
Sensory Organ like Response of Zigzag Edge Graphene Nanoribbons
Sensory Organ Zigzag Edge Graphene Nanoribbons
2010/11/25
Using a continuum Dirac theory, we study the density and spin response of zigzag edge erminated
graphene ribbons subjected to edge potentials and Zeeman fields. Our analytical calculations of the den...
Nobel Prize in Physics 2010 was given for “groundbreaking experiments regarding the two-dimensional material graphene.” In fact, before graphene has been extracted from graphite and measured, some of ...
Topographic and electronic contrast of the graphene moiré on Ir(111) probed by scanning tunneling microscopy and non-contact atomic force microscopy
Topographi electronic contrast tunneling microscopy non-contact atomic force microscopy
2010/11/23
Epitaxial graphene grown on single crystal transition metal surfaces typically exhibits a moiré
pattern due to the lattice mismatch between graphene and the underlying metal surface. We use si-multan...
Spin exchange interaction with tunable range between graphene quantum dots
Spin exchange interaction tunable graphene quantum dots
2010/11/22
We study the spin exchange between two electrons localized in separate quantum dots in graphene.The electronic states in the conduction band are coupled indirectly by tunneling to a common continuum o...
A density-functional approach on the hexagonal graphene lattice is developed using an exact
numerical solution to the Hubbard model as the reference system. Both nearest-neighbour and up
to third ne...
Magnetoresistivity and Hole-effect were theoretically investigated for neutral and gated graphene. It is shown that in neutral graphene Hall-effect is totally absent. In gated, exactly monopolar graph...
Tunable band gaps in bilayer graphene-BN heterostructures
Tunable band gaps bilayer graphene-BN heterostructures
2010/11/19
We investigate band-gap tuning of bilayer graphene between hexagonal boron nitride sheets,
by external electric elds. Using density functional theory, we show that the gap is continuously tunable fr...
Relativistic graphene ratchet on semidisk Galton board
Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Chaotic Dynamics (nlin.CD)
2010/11/10
Using extensive Monte Carlo simulations we study numerically and analytically a photogalvanic effect, or ratchet, of directed electron transport induced by a microwave radiation on a semidisk Galton b...
Energy gaps in graphene nano-constrictions with different aspect ratios
Energy gaps graphene nano-constrictions different aspect ratios
2010/11/19
We present electron transport measurements on lithographically defined and etched graphene
nano-constrictions with different aspect ratios, including different length (l) and width (w). A roughly len...
Density of states of a graphene in the presence of strong point defects
graphene strong point defects
2010/11/19
The density of states near zero energy in a graphene due to strong point defects with random
positions are computed. Instead of focusing on density of states directly, we analyze eigenfunctions of in...