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13 998 (0,209s)

Result

Defect modes caused by twinning in one-dimensional photonic crystals

with a twin defect is studied using a transfer-matrix method. We derive analytical expressions for the frequency of defect modes and for the enhancement of the electromagnetic field inside the defect. In particula...

BM - Fyzika pevných látek a magnetismus

  • 2004
  • Jx
Result

Time-domain terahertz study of defect formation in one-dimensional photonic crystals

One-dimensional photonic crystals composed of silicon and air layers with and without twinning defect are studied by means of terahertz time-domain transmission and reflection spectroscopy. It is shown and experimentally demonstrate...

BM - Fyzika pevných látek a magnetismus

  • 2004
  • Jx
Result

Characterization of the matrix-twin interface of a (1 0 -1 2) twin during growth

A model of twin growth in magnesium is presented together with the analysis of defects responsible for this growth. The twin interface is represented by {10-12 dipoles superimposed on basal-prismatic and conjugate twin<...

BM - Fyzika pevných látek a magnetismus

  • 2014
  • Jx
  • Link
Result

Birth Defects Incidence in Children from Single and Twin Pregnancies in the Czech Republic - Current Data

An analysis of occurence of birth defects in children from single and twin incidences of selected types of birth defects in births according to pregnancy multiplicity. A statistically significant difference in total birth <...

BB - Aplikovaná statistika, operační výzkum

  • 2009
  • Jx
Result

Slip dislocation and twin nucleation mechanisms in hcp metals

A new nucleation mechanism is proposed for {10 1 - 1} deformation twin in hcp is about 7 % of shear modulus), the core of a slip dislocation can transform to a twin embryo. The transformation and subsequent twin growth are ...

Condensed matter physics (including formerly solid state physics, supercond.)

  • 2017
  • Jimp
  • Link
Result

Non-diffusional growth mechanism of I-1 basal stacking-faults inside twins in hcp metals

Deformation twins in magnesium exhibit considerable densities of I-1 basal-plane stacking-faults. Since these faults generally transect their host twin, they presumably lengthen concommitantly with boundary migration during twin...

Materials engineering

  • 2019
  • Jimp
  • Link
Result

Twin domain structure in magnetically doped Bi2Se3 topological insulator

formalism, we study the interaction between twin planes in Bi2Se3. We show the influence of various magnetic and nonmagnetic chemical defects on the twin plane formation energyTwin domains are naturally present in...

Condensed matter physics (including formerly solid state physics, supercond.)

  • 2020
  • Jimp
  • Link
Result

Real-time atomic-resolution observation of coherent twin boundary migration in CrN

microscopy, we report two different twin boundary defect (TD) nucleation and CTB migration modes at the CTB/ITB (incoherent twin boundary) and CTB/surface junctions. A new twin defect nucleation and CTB m...

Materials engineering

  • 2021
  • Jimp
  • Link
Result

Planar defects on {121} plane in 2H structure

The structures of stacking faults and twin boundaries on {121} plane in 2H structure are modelled by using of many-body potentials. Two types of stacking faults and three types of twin boundaries were found as result of calculation....

BM - Fyzika pevných látek a magnetismus

  • 2009
  • D
Result

Unravelling the nucleation and growth of {11-(2)over-bar2} twins

competing structures of twin boundary. The twin growth is mediated by subsequent glide of step-like defects (disconnections) along the {1122} boundary. The twin shearA recently proposed mechanism of {11 <(2) over ...

Nano-materials (production and properties)

  • 2022
  • Jimp
  • Link
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