搜索结果: 61-75 共查到“理学 graphene”相关记录121条 . 查询时间(0.171 秒)
We performed a systematic density functional study of the adsorption of copper, silver, and gold adatoms on graphene, especially accounting for van der Waals interactions by the vdW-DF and the PBE+D2 ...
Influence of electron-hole drag on conductivity of neutral and gated graphene
Influence of electron-hole drag gated graphene
2010/11/18
Conductivity of monolayer and two-layer graphene is considered with due regard for mutual drag of band elec-trons and holes. Search of contribution of the drag in conductivity shows that this effect c...
Graphene, a single atomic layer of graphite, first isolated in 2004 [2], has made a quantum leap in the exploration of the physics of two-dimensional electron systems [3, 4]. Since the initial report ...
Edge stability, reconstruction, zero-energy states and magnetism in triangular graphene quantum dots with zigzag edges
Edge stability magnetism zigzag edges
2010/11/17
We present the results of ab-initio density functional theory based calculations of the stability and reconstruction of zigzag edges in triangular graphene quantum dots. We show that, while the recons...
Terahertz surface plasmons in optically pumped graphene structures
Terahertz surface plasmons optically pumped graphene structures
2010/11/17
We analyze the surface plasmons (SPs) propagating along the optically pumped single-graphene
layer (SGL) and multiple-graphene layer (MGL) structures. It is shown that at sufficiently strong optical ...
Tunneling conductance in strained graphene-based superconductor: Effect of asymmetric Weyl-Dirac fermions
tunneling conductance strained graphene Specular Andreev reflection
2010/11/18
Based on the BTK theory, we investigate the tunneling conductance in a uniaxially strained graphene-based normal metal (NG)/ barrier (I)/superconductor(SG) junctions. In the present model, we assume t...
Comparison of Graphene Formation on C-face and Si-face SiC {0001} Surfaces
Comparison of Graphene Formation Si-face SiC {0001} Surfaces
2010/11/19
The morphology of graphene formed on the ( 0001 ) surface (the C-face) and the (0001) surface
(the Si-face) of SiC, by annealing in ultra-high vacuum or in an argon environment, is studied by atomic ...
Oxidation resistance of graphene-coated Cu and Cu/Ni alloy
Oxidation resistance graphene-coated Cu Cu/Ni alloy
2010/11/23
The ability to protect refined metals from reactive environments is vital to many industrial and academic applications. Current solutions, however, typically introduce several negative effects, includ...
The effective fine structure constant of freestanding graphene measured in graphite
effective fine structure constant graphite
2010/11/18
Electrons in graphene behave like Dirac fermions, permitting phenomena from high energy
physics to be studied in a solid state setting. A key question is whether or not these Fermions are critically ...
Raman Spectroscopy Study of Annealing-Induced Effects on Graphene Prepared by Micromechanical Exfoliation
Graphene Raman spectroscopy Thermal annealing
2010/11/22
Since its isolation from graphite,1 graphene has drawn a lot of experimental and theoretical research. These efforts have been mostly in pursuit of various applications such as electronics,2 sensors,3...
Hysteresis of Electronic Transport in Graphene Transistors
graphene transistor conductance hysteresis charge transfer capacitive gating water dipole
2010/11/17
Graphene field effect transistors commonly comprise graphene flakes lying on SiO2 surfaces. The
gate-voltage dependent conductance shows hysteresis depending on the gate sweeping rate/range. It is sh...
Atmospheric Oxygen Binding and Hole Doping in Deformed Graphene on a SiO2 Substrate
graphene Raman spectroscopy scanning tunneling microscopy (STM)
2010/11/22
Using micro-Raman spectroscopy and scanning tunneling microscopy, we study the relationship between structural distortion and electrical hole doping of graphene on a silicon dioxide substrate. The obs...
The non-retarded Casimir interaction (van der Waals interaction) between two free standing
graphene sheets as well as between a graphene sheet and a substrate is determined. An exact
analytical expr...
We describe the gated bilayer graphene system when it is subjected to intense terahertz frequency electromagnetic radiation. We examine the electron band structure and density of states via exact diag...
Tunable Thermal Transport and Mechanical Properties in Strained Graphene Nanoribbons
Tunable Thermal Transport Strained Graphene Nanoribbons
2010/11/22
We study the effects of stress and strain on thermal transport and mechanical properties
of armchair and zigzag graphene nanoribbons (AGNR and ZGNRs) using non-equilibrium
molecular dynamics simulat...