scholarly journals Inelastic scattering in a monolayer graphene sheet: A weak-localization study

2008 ◽  
Vol 78 (12) ◽  
Author(s):  
Dong-Keun Ki ◽  
Dongchan Jeong ◽  
Jae-Hyun Choi ◽  
Hu-Jong Lee ◽  
Kee-Su Park
Keyword(s):  
Inelastic Scattering ◽  
Graphene Sheet ◽  
Weak Localization ◽  
Monolayer Graphene ◽  
Localization Study

scholarly journals Simulated Nanoscale Peeling Process of Monolayer Graphene Sheet: Effect of Edge Structure and Lifting Position

2010 ◽  
Vol 2010 ◽  
pp. 1-12 ◽  
Author(s):  
Naruo Sasaki ◽  
Hideaki Okamoto ◽  
Shingen Masuda ◽  
Kouji Miura ◽  
Noriaki Itamura
Keyword(s):  
Graphene Sheet ◽  
Atomic Scale ◽  
Monolayer Graphene ◽  
Lattice Period ◽  
Force Curve ◽  
Stick Slip ◽  
Edge Structure ◽  
Sliding Motion ◽  
Peeling Process ◽  
Surface Contact

The nanoscale peeling of the graphene sheet on the graphite surface is numerically studied by molecular mechanics simulation. For center-lifting case, the successive partial peelings of the graphene around the lifting center appear as discrete jumps in the force curve, which induce the arched deformation of the graphene sheet. For edge-lifting case, marked atomic-scale friction of the graphene sheet during the nanoscale peeling process is found. During the surface contact, the graphene sheet takes the atomic-scale sliding motion. The period of the peeling force curve during the surface contact decreases to the lattice period of the graphite. During the line contact, the graphene sheet also takes the stick-slip sliding motion. These findings indicate the possibility of not only the direct observation of the atomic-scale friction of the graphene sheet at the tip/surface interface but also the identification of the lattice orientation and the edge structure of the graphene sheet.

scholarly journals Strong Coupling of Surface Plasmon Polaritons in Monolayer Graphene Sheet Arrays

2012 ◽  
Vol 109 (7) ◽  
Author(s):  
Bing Wang ◽  
Xiang Zhang ◽  
Francisco J. García-Vidal ◽  
Xiaocong Yuan ◽  
Jinghua Teng
Keyword(s):  
Graphene Sheet ◽  
Strong Coupling ◽  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Monolayer Graphene ◽  
Plasmon Polaritons

Universal Conductance Fluctuation Due to Development of Weak Localization in Monolayer Graphene

2019 ◽  
Vol 256 (6) ◽  
pp. 1800515
Author(s):  
Daiju Terasawa ◽  
Akira Fukuda ◽  
Akira Fujimoto ◽  
Yasuhide Ohno ◽  
Yasushi Kanai ◽  
...  
Keyword(s):  
Weak Localization ◽  
Monolayer Graphene ◽  
Conductance Fluctuation ◽  
Universal Conductance

scholarly journals Temperature-dependent negative Poisson’s ratio of monolayer graphene: Prediction from molecular dynamics simulations

2019 ◽  
Vol 8 (1) ◽  
pp. 415-421 ◽  
Author(s):  
Yin Fan ◽  
Yang Xiang ◽  
Hui-Shen Shen
Keyword(s):  
Molecular Dynamics ◽  
Graphene Sheet ◽  
Poisson’S Ratio ◽  
Poisson's Ratio ◽  
Monolayer Graphene ◽  
Pristine Graphene ◽  
Negative Poisson’S Ratio ◽  
Temperature Dependent ◽  
Free Standing ◽  
Negative Poisson's Ratio

Abstract A temperature-dependent intrinsic property of monolayer graphene, the negative Poisson’s ratio (NPR), is investigated in the present study. The classical molecular dynamics (MD) method is employed and the Erhart-Albe hybrid potential, i.e. the combination of the reactive empirical bond order (REBO) and the Tersoff potentials, is used for the graphene sheet in the numerical simulation. In the simulation process, the graphene sheet is assumed to be free standing with in-plane periodical boundary condition and under an ambient temperature up to 1000 K. Our study shows that the graphene NPR is decreased with the increase of temperature. Besides, we also perform the simulation of the graphene negative temperature expansion coefficient (NTEC) as an indirect validation of the present MD model. The characteristics of the nonlinear variations for both the NPR and the NTEC of a pristine graphene sheet are investigated. Our MD results at low temperature (0.1 K) further prove the intrinsic and anisotropic property of NPR for graphene.

Coulomb impurity effect on electrically induced Dirac bound states in graphene

2015 ◽  
Vol 29 (06) ◽  
pp. 1550037 ◽  
Author(s):  
C. M. Lee ◽  
K. S. Chan
Keyword(s):  
Magnetic Field ◽  
Graphene Sheet ◽  
Electrostatic Potential ◽  
Bound States ◽  
Electron System ◽  
Monolayer Graphene ◽  
Impurity Effect ◽  
Absorption Coefficients ◽  
Dirac Electron ◽  
Positively Charged

Using the massless Dirac–Weyl model for monolayer graphene sheet, we study the low-lying spectra of a single Dirac electron system bound to an on-center positively charged Coulomb impurity, under both electrostatic potential and magnetic field. Numerical results obtained from diagonalization show that, the increase of the electrostatic potential causes the low-lying states to evolve from one Landau-type plateau to the higher ones, and the whole spectra exhibit similar features with slight shifts in eigenenergies when the on-center impurity is considered. Electrostatic-potential dependent optical spectra with their corresponding absorption coefficients as functions of incident photon energies for transitions between low-lying states are presented.

Highly efficient field emission from large-scale and uniform monolayer graphene sheet supported on patterned ZnO nanorod arrays

2014 ◽  
Vol 2 (20) ◽  
pp. 3965 ◽  
Author(s):  
Lijing Zhang ◽  
Xiaomiao Liu ◽  
Zhipeng Lian ◽  
Xiaoqing Wang ◽  
Guangqiu Shen ◽  
...  
Keyword(s):  
Graphene Sheet ◽  
Field Emission ◽  
Large Scale ◽  
Monolayer Graphene ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Highly Efficient

Synthesis of Large-Area and Monolayer of Graphene: Role of Transition Metal Support and Growth Time by CVD Method

2011 ◽  
Vol 306-307 ◽  
pp. 331-335
Author(s):  
Hui Gao ◽  
Yun Fei Wang ◽  
Yan Xia Liu ◽  
Er Qing Xie ◽  
Pulickel M. Ajayan
Keyword(s):  
Graphene Sheet ◽  
Chemical Vapor ◽  
Liquid Hydrocarbon ◽  
Growth Time ◽  
Monolayer Graphene ◽  
Large Area ◽  
Cvd Method ◽  
Graphene Synthesis ◽  
Transmission Electron ◽  
Metal Support

Continuous monolayer graphene sheet with large area has been synthesized via chemical vapor deposition (CVD) method using liquid hydrocarbon as precursor. Synthesis parameters including growth substrate and growth time have been investigated to assess their influence on monolayer graphene synthesis. Raman spectroscopy and high resolution transmission electron microscopy (HRTEM) reveal that the number of layers and quality of graphene sheet depend greatly on the varied synthesis parameter. The study could be used to improve understanding the growth of graphene by CVD method in order to meet the needs of graphene in various electronic applications.

Tuning Graphene Surface Resistance for a 52 GHz Nano-Antenna

2015 ◽  
Vol 754-755 ◽  
pp. 1151-1155
Author(s):  
A.A.M. Ezanuddin ◽  
A.H. Ismail
Keyword(s):  
Sheet Resistance ◽  
Graphene Sheet ◽  
Millimeter Wave ◽  
Surface Resistance ◽  
Graphene Film ◽  
Monolayer Graphene ◽  
60 Ghz ◽  
Graphene Surface ◽  
Commercial Potential ◽  
Key Variables

The commercial potential of the 60 GHz band, in combination with the scaling growth of graphene nanotechnology, has resulted in a lot of digital graphene circuits for millimeter-wave application. This work presents a 0.345 nm monolayer graphene film on substrates SiO2/Teflon/Copper as a new nanoantenna. The nanoantenna achieves 2.003 of maximum gain (Abs) with particularly the graphene sheet resistance and reactance as the key variables. The presented nanoantenna targets 52 GHz communication where beamforming is required.

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