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Wriggling Microtubules Help Explain Coupling of “Active” Defects and Curvature（图）
Wriggling Microtubules Explain Coupling Active Defects Curvature
2017/10/26
Imagine a tiny donut-shaped droplet, covered with wriggling worms. The worms are packed so tightly together that they must locally line up with respect to each other. In this situation, we would say t...
UNIVERSITY PARK, Pa. -- Understanding how atoms "glide" and "climb" on the surface of 2D crystals like tungsten disulphide may pave the way for researchers to develop materials with unusual or unique ...
Geometrical defects in two-dimensional melting of many-particle Yukawa systems
Geometrical defects two-dimensional melting many-particle Yukawa systems Plasma Physics
2012/5/17
We perform Langevin dynamics simulations and use polygon construction method to investigate two-dimensional (2D) melting and freezing transitions in many-particle Yukawa systems. 2D melting transition...
Excitation of plasmons in two-dimensional electron gas with defects by microwaves: Wake-field method
plasmons two-dimensional electron gas microwaves Wake-field method
2011/8/17
Abstract: We develop an analytical method to find plasmons generated by microwaves in a two-dimensional electron gas with defects. The excitations are expressed in terms of the wake field of a charged...
Strain-tuning of quantum dot optical transitions via laser-induced surface defects
Strain-tuning quantum dot optical transitions laser-induced surface defects
2011/8/17
Abstract: We discuss the fine-tuning of the optical properties of self-assembled quantum dots by the strain perturbation introduced by laser-induced surface defects. We show experimentally that the qu...
On the motion of point defects in relativistic fields
the motion of point defects relativistic fields Mathematical Physics
2011/9/2
Abstract: We inquire into classical and quantum laws of motion for the point charge sources in the nonlinear Maxwell-Born-Infeld field equations of classical electromagnetism in flat and curved Einste...
Defects in the discrete non-linear Schrodinger model
Defects non-linear Schrodinger model High Energy Physics - Theory
2011/7/27
Abstract: The discrete non-linear Schrodinger (NLS) model in the presence of an integrable defect is examined. The problem is viewed from a purely algebraic point of view, starting from the fundamenta...
Energy density in density functional theory: Application to crystalline defects and surfaces
Energy density density functional theory crystalline defects surfaces
2010/11/25
We propose a method to decompose the total energy of a supercell containing defects into
contributions of individual atoms, using the energy density formalism within density functional
theory. The s...
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...
Fast algorithms for computing defects and their derivatives in the Regge calculus
Fast algorithms defects derivatives Regge calculus
2010/12/20
Any practical attempt to solve the Regge equations, these being a large system of non-linear algebraic equations, will almost certainly employ a Newton-Raphson like scheme. In such cases it is essenti...
Flat band in the core of topological defects: bulk-vortex correspondence in topological superfluids with Fermi points
Flat band topological superfluids Fermi points
2010/11/24
We consider the dimensional crossover in the topological matter, which involves the transformation of different types of topologically protected zeroes in the fermionic spectrum. In the considered cas...
Heisenberg spin textures on a cylinder with topological defects
Heisenberg’s spins nanomagnetism
2010/7/8
The present work aims to study equilibrium configurations of spins on a cylinder with topological defects such as screw dislocation and deficit angle. By making use of elliptic-f expansion method, whi...
Topological Defects in Liquid Crystal Films
director field free-energy density topological
current topological defects winding number
2007/8/15
2007Vol.47No.6pp.1125-1128DOI:
Topological Defects in Liquid Crystal Films
DUAN Yi-Shi,1 ZHAO Li,1 ZHANG Xin-Hui,1 and SI Tie-Yan2
1 Institute of Theoretical Physics, La...
Distribution of Topological Defects on Axisymmetric Surface
topological defects membrane axisymmetric surface
2007/8/15
2006Vol.46No.2pp.319-322DOI:
Distribution of Topological Defects on Axisymmetric Surface
SI Tie-Yan1 and DUAN Yi-Shi2
1 Institute of Theoretical Physics, the Chinese Aca...
Hall Effect in InAs/GaAs Superlattices with Quantum Dots: Identifying the Presence of Deep Level Defects
InAs/GaAs Superlattices Quantum Dots the Presence of Deep Level Defects
2010/10/21
We have carried out van der Pauw resistivity and Hall effect measurements on a series of Molecular Beam Epitaxy InAs/GaAs superlattice samples containing InAs quantum dots. Three growth parameters wer...