Today, the full lattice of a crystal can often be infe... W Qin,P Fraundorf - 《Ultramicroscopy》 被引量: 34发表: 2003年 Determination of unit cell (CBED) provides a two-dimensional projection of the three-dimensional reciprocal lattice and can be utilized to reconstruct the unit cell ...
Bravais lattice (2-dimensionalclassification of netplanesglide reflectionslattice vectorsMinkowski reductionmirror linesnetplanesnetplane symmetryrotation operationsspace groupsSummary This chapter contains sections titled: Basic Definitions, Miller Indices Reciprocal Lattice Netplane-Adapted Lattice Vectors ...
6. In addition to tuning the position of the DCs, we can manipulate the orientation of the Berry curvature dipolar distribution, from being parallel to the reciprocal lattice vectors to having a generic length and orientation. Table 1 summarizes the action of the on-site perturbations studied so...
In this work, we develop a large-scale mapping approach based on nanobeam four-dimensional scanning transmission electron microscopy31(4D-STEM) (Fig.1b-e) to reveal the in-plane lattice distortion (Fig.1f) and out-of-plane stacking information (Fig.1g) simultaneously in vdW FE SnSe. Despite...
2.1.1 Two-dimensional NMR spectroscopy Two-dimensional NMR spectroscopic techniques can be used to overcome specific problems, as to (i) increase spectral resolution; (ii) provide nuclear spin proximities; (iii) establish correlation between two homo- and/or heteronuclear nuclear spin pairs ...
The reciprocal lattice vectors a* and b* are indicated. The (1, 5) refection, at 16.7 A resolution, is clearly visible (arrow). Diffraction to 14.2 A is present in the digitized and averaged data from several images. (bottom) Two-dimensional projection map calculated from the noise-...
Based on first-principles calculations and tight-binding model analysis, we propose monolayer graphdiyne as a candidate material for a two-dimensional higher-order topological insulator protected by inversion symmetry. Despite the absence of chiral symmetry, the higher-order topology of monolayer graphdiyne...
We report on the fabrication of what we believe is the first example of a two-dimensional (2D) nonlinear photonic crystal [Berger, Phys. Rev. Lett. 81, 4136 (1998)], where the refractive index is constant but where the 2nd order nonlinear susceptibility is spatially periodic. Such crystals...
We propose a two-dimensional photonic crystal that possesses a degenerate ring in the momentum space. The photonic crystal is composed of the parallel-plate metal filled with a periodically arranged square array of metallic cylinders. Opening an air gap breaks the z-inversion symmetry, leading to ...
On the basis of the primitive reciprocal lattice vectors “b1” and “b2,” the point at which the wave-number vector “k” of light has the value given by formula (1) below is called the Γ point. k=nb1+mb2 (1) where “n” and “m” are arbitrary integers. ...