搜索结果: 1-15 共查到“知识库 理学 Graphene”相关记录94条 . 查询时间(0.25 秒)
Ab initio calculation of ideal strength and phonon instability of graphene in tension
strength phonon instability graphene
2012/8/8
Graphene-based sp2-carbon nanostructures such as carbon nanotubes and nanofibers can fail
near their ideal strengths due to their exceedingly small dimensions. We have calculated the
phonon spectra ...
A molecular simulation analysis of producing monatomic carbon chains by stretching ultranarrow graphene nanoribbons
molecular simulation analysis monatomic carbon chains ultranarrow graphene nanoribbons Computational Physics
2012/4/20
Atomistic simulations were utilized to develop fundamental insights regarding the elongation process starting from ultranarrow graphene nanoribbons (GNRs) and resulting in monatomic carbon chains (MAC...
On the zero-field orbital magnetic susceptibility of Bloch electrons in graphene-like solids: Some rigorous results
Diamagnetism zero-field susceptibility two-dimensional electrons gas graphene semiconductors
2012/4/17
Starting with a nearest-neighbors tight-binding model, we rigorously investigate the bulk zero-field orbital susceptibility of a non-interacting Bloch electrons gas in graphene-like solids at fixed te...
We investigate two seemingly disjoint definitions of helicity, one commonly used in particle physics, the other one used when studying bilinear covariants of Clifford algebras. We can prove that the `...
Epitaxial growth mechanisms of graphene and effects of substrates
Epitaxial growth mechanisms graphene effects of substrates
2012/2/29
The growth process of single layer graphene with and without substrate is investigated using ab-initio, finite temperature molecular dynamic calculations within density functional theory. An understan...
Highly tunable spin-dependent electron transport through carbon atomic chains connecting two zigzag graphene nanoribbons
Highly tunable spin-dependent electron transport carbon atomic chains zigzag graphene nanoribbons
2012/2/27
Motivated by recent experiments of successfully carving out stable carbon atomic chains from graphene [Meyer et al. Nature (London) 454, 319 (2008); Jin et al. Phys. Rev. Lett. 102, 205501 (2009)] we ...
Effect of charged impurity correlation on transport in monolayer and bilayer graphene
charged impurity correlation transport monolayer bilayer graphene
2012/2/27
We study both monolayer and bilayer graphene transport properties taking into account the presence of correlations in the spatial distribution of charged impurities. In particular we find that the exp...
Transport in a three-terminal graphene quantum dot in the multi-level regime
Transport three-terminal graphene quantum dot the multi-level regime
2012/2/27
We investigate transport in a three-terminal graphene quantum dot. All nine elements of the conductance matrix have been independently measured. In the Coulomb blockade regime accurate measurements of...
Manipulating infrared photons using plasmons in transparent graphene superlattices
Manipulating infrared photons plasmons transparent graphene superlattices
2012/2/27
Superlattices are artificial periodic nanostructures which can control the flow of electrons. Their operation typically relies on the periodic modulation of the electric potential in the direction of ...
We present a review of the electronic compressibility of monolayer and bilayer graphene. We focus on describing theoretical calculations of the effects of electron--electron interactions and various t...
Graphene is a promising candidate for optoelectronic applications such as photodetectors, terahertz imagers, and plasmonic devices. The origin of photoresponse in graphene junctions has been studied e...
First-principles Analysis of Photo-current in Graphene PN Junctions
First-principles Analysis Photo-current Graphene PN Junctions
2012/2/29
We report a first principles investigation of photocurrent generation by graphene PN junctions. The junctions are formed by either chemically doping with nitrogen and boron atoms, or by controlling ga...
Pairing in graphene: A quantum Monte Carlo study
Pairing in graphene A quantum Monte Carlo study
2014/5/28
To address the issue of electron correlation driven superconductivity in graphene, we perform a systematic quantum Monte Carlo study of the pairing correlation in the t -U-V Hubbard model on a honeyco...
To address the issue of electron correlation driven superconductivity in graphene, we perform a systematic quantum Monte Carlo study of the pairing correlation in thet-U-VHubbard model on a honeycomb ...
Computation of electron quantum transport in graphene nanoribbons using GPU
Green's function formalism GPU graphene ribbon
2011/8/11
Abstract: The performance potential for simulating quantum electron transport on graphical processing units (GPUs) is studied. Using graphene ribbons of realistic sizes as an example it is shown that ...