scholarly journals Point Defects in Two-Dimensional γ-Phosphorus Carbide

2020 ◽  
pp. 620-626
Author(s):  
Andrey A. Kistanov ◽  
Vladimir R. Nikitenko ◽  
Oleg V. Prezhdo
Keyword(s):  
Point Defects ◽  
Two Dimensional

scholarly journals Surface, size and topological effects for some nematic equilibria on rectangular domains

2020 ◽  
Vol 25 (5) ◽  
pp. 1101-1123 ◽  
Author(s):  
Lidong Fang ◽  
Apala Majumdar ◽  
Lei Zhang
Keyword(s):  
Aspect Ratio ◽  
Point Defects ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Bifurcation Diagrams ◽  
Variable Formula ◽  
Limiting Profile ◽  
Switching Dynamics ◽  
Line Defects ◽  
Carry Over

We study nematic equilibria on rectangular domains, in a reduced two-dimensional Landau–de Gennes framework. These reduced equilibria carry over to the three-dimensional framework at a special temperature. There is one essential model variable, [Formula: see text], which is a geometry-dependent and material-dependent variable. We compute the limiting profiles exactly in two distinguished limits: the [Formula: see text] 0 limit relevant for macroscopic domains and the [Formula: see text] limit relevant for nanoscale domains. The limiting profile has line defects near the shorter edges in the [Formula: see text] limit, whereas we observe fractional point defects in the [Formula: see text] 0 limit. The analytical studies are complemented by some bifurcation diagrams for these reduced equilibria as a function of [Formula: see text] and the rectangular aspect ratio. We also introduce the concept of ‘non-trivial’ topologies and study the relaxation of non-trivial topologies to trivial topologies mediated via point and line defects, with potential consequences for non-equilibrium phenomena and switching dynamics.

Energetics of point defects in the two-dimensional Wigner crystal

1991 ◽  
Vol 43 (1) ◽  
pp. 623-629 ◽  
Author(s):  
Eric Cockayne ◽  
Veit Elser
Keyword(s):  
Point Defects ◽  
Wigner Crystal ◽  
Two Dimensional

scholarly journals Point defects in two-dimensional colloidal crystals: simulation vs. elasticity theory

Soft Matter ◽  
2009 ◽  
Vol 5 (3) ◽  
pp. 646-659 ◽  
Author(s):  
Wolfgang Lechner ◽  
Christoph Dellago
Keyword(s):  
Elasticity Theory ◽  
Point Defects ◽  
Colloidal Crystals ◽  
Two Dimensional

scholarly journals From Point Defects in Graphene to Two-Dimensional Amorphous Carbon

2011 ◽  
Vol 106 (10) ◽  
Author(s):  
J. Kotakoski ◽  
A. V. Krasheninnikov ◽  
U. Kaiser ◽  
J. C. Meyer
Keyword(s):  
Amorphous Carbon ◽  
Point Defects ◽  
Two Dimensional

scholarly journals Displacement fields of point defects in two-dimensional colloidal crystals

2008 ◽  
Vol 20 (40) ◽  
pp. 404202 ◽  
Author(s):  
Wolfgang Lechner ◽  
Elisabeth Schöll-Paschinger ◽  
Christoph Dellago
Keyword(s):  
Point Defects ◽  
Colloidal Crystals ◽  
Two Dimensional ◽  
Displacement Fields

scholarly journals Water dissociation and association on mirror twin boundaries in two-dimensional MoSe2: insights from density functional theory calculations

2021 ◽  
Author(s):  
Thomas Joseph ◽  
Mahdi Ghorbani-Asl ◽  
Matthias Batzill ◽  
Arkady V Krasheninnikov
Keyword(s):  
Density Functional Theory ◽  
Transition Metal ◽  
Point Defects ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Water Dissociation ◽  
Water Molecules ◽  
Two Dimensional ◽  
Functional Theory ◽  
Adsorption And Dissociation

The adsorption and dissociation of water molecules on two-dimensional transition metal dichalco- genides (TMDs) is expected to be dominated by point defects, such as vacancies, and edges. At the same...

Channel-Add Operation of a Device Using Defects in a Two-Dimensional Photonic Crystal Slab

2002 ◽  
Vol 722 ◽  
Author(s):  
Takashi Asano ◽  
Susumu Noda ◽  
Kazuaki Kiyota ◽  
Yoshinori Tanaka ◽  
Yoshihiro Akahane ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Point Defect ◽  
Point Defects ◽  
Free Space ◽  
Two Dimensional ◽  
Line Defect ◽  
Dimensional Photonic Crystal ◽  
Photonic Crystal Slab ◽  
Filtering Function ◽  
Two Dimensional Photonic Crystal

AbstractA channel add-filtering function of a device based on defects in a two dimensional photonic crystal slab is investigated in addition to a channel drop-filtering function reported previously. It is considered that photons irradiated to a point defect from free space are trapped by the point defect, are transferred to a line defect waveguide nearby, and are emitted from the waveguide edge. It is shown that the spectrum of the add-filtering function is almost same as that of the drop-filtering function, which demonstrates that photons can be not only dropped-from but also added-to a line-defect waveguide through the resonant trapping by point defects.

Point defects in two-dimensional BeO monolayer: First-principles study on electronic and magnetic properties

2021 ◽  
Author(s):  
Asadollah Bafekry ◽  
M. Faraji ◽  
Siavash Karbasizadeh ◽  
Abbas bagheri khatibani ◽  
Ali Abdollahzadeh ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Point Defects ◽  
First Principles ◽  
Experimental Results ◽  
Two Dimensional ◽  
Electronic And Magnetic Properties ◽  
First Principles Study

Very recently, the 2D form of BeO monolayer has been successfully fabricated [Hui Zhang et al., ACS Nano 2021, 15, 2497]. Motivated by these exciting experimental results on 2D layered...

scholarly journals Diffusion of point defects in two-dimensional colloidal crystals

Nature ◽  
2001 ◽  
Vol 413 (6852) ◽  
pp. 147-150 ◽  
Author(s):  
Alexandros Pertsinidis ◽  
X. S. Ling
Keyword(s):  
Point Defects ◽  
Colloidal Crystals ◽  
Two Dimensional

scholarly journals Entropy and kinetics of point defects in two-dimensional dipolar crystals

2015 ◽  
Vol 91 (3) ◽  
Author(s):  
Wolfgang Lechner ◽  
David Polster ◽  
Georg Maret ◽  
Christoph Dellago ◽  
Peter Keim
Keyword(s):  
Point Defects ◽  
Two Dimensional ◽  
Kinetics Of
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