We demonstrate the extensive improvement of the effective refractive index of designed
metamaterials through the coupling effect of double layers in terahertz region. It is interesting …

In order to design optical metamaterials to surpass the limitation of unnaturally high
refractive index in visible range, we propose the nanocylinders nanostructure with …

We report a polarization-independent unnaturally high refractive index metamaterial. It is
found that the effective permittivity of the designed metamaterial can be drastically increased …

We report on the extension of the single-center convergent close-coupling method to
positron scattering on multielectron atoms, along with the development of a technique for …

A sol-gel method was employed to synthesize phase-pure (1-x) BiFeO3-xBi (Mn0. 5Ti0. 5)
O3 (abbreviated as BFO-xBMT, x= 0–0.10) multiferroic ferrites. The investigation focused on …

We study the nearest-neighbor Heisenberg antiferromagnet on a face-centered cubic lattice
with arbitrary spin S. The model exhibits degenerate classical ground states including two …

The single-center convergent close coupling (CCC) method has been applied to positron
scattering from the oxygen atom. Cross sections have been calculated for total, elastic …

Refraction in materials is a fundamental phenomenon in optics and is a factor in the
manipulation of light, such as wavefront sha** and beam control. However, conventional …

Metasurfaces substituted for naturally occurring materials make it possible to develop flat
optics manipulating terahertz waves. However, the control of unprecedented material …

In frustrated magnetic systems with competing interactions fluctuations can lift the residual
accidental degeneracy. We argue that the state selection may have different outcomes for …