Disclination

Disclination

A disclination is a line defect in which rotational symmetry is violated.[1] In analogy with dislocations in crystals, the term, disinclination, for liquid crystals first used by F. C. Frank and since then has been modified to its current usage, disclination[2]. It is a defect in the orientation of director whereas a dislocation is a defect in positional order.[3]

References

  1. ^ M. Murayama, J. M. Howe, H. Hidaka, S. Takaki. Atomic-Level Observation of Disclination Dipoles in Mechanically Milled, Nanocrystalline Fe. Science 29 (2002) 2433. doi:10.1126/science.1067430
  2. ^ S. Chandrasekhar, Liquid Crystals, p.123, Cambridge University Press 1977, ISBN 0-521-21149-2
  3. ^ . Pure Appl. Chem. 73 (2001) 845.

Further reading



Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • disclination — noun a) Any of several defects in rotational symmetry, especially in the orientation of the molecules of a liquid crystal b) extorsion …   Wiktionary

  • disclination — dis·cli·na·tion (dis″klĭ naґshən) extorsion …   Medical dictionary

  • disclination — Смотри Дисклинация …   Энциклопедический словарь по металлургии

  • disclination dipole — Смотри дисклинационный диполь …   Энциклопедический словарь по металлургии

  • дисклинационный диполь — [disclination dipole] две расположенные на небольшом расстоянии одна от другой параллельных клиновые дисклинации разных знаков; Смотри также: Диполь дислокационный диполь …   Энциклопедический словарь по металлургии

  • Дисклинация — [disclination] линейный дефект в кристалле, представляющий область упругого искажения кристаллической решетки,связанный с поворотом на определенный угол одной части кристалла относительно другой в ограниченной области и вызывающий изменение… …   Энциклопедический словарь по металлургии

  • Einstein–Cartan theory — in theoretical physics extends general relativity to correctly handle spin angular momentum. As the master theory of classical physics general relativity has one known flaw: it cannot describe spin orbit coupling , i.e., exchange of intrinsic… …   Wikipedia

  • Copley Medal — The Copley Medal awarded to Mendeleev in 1905 …   Wikipedia

  • Teleparallelism — (also called distant parallelism and teleparallel gravity), was an attempt by Einstein to unify electromagnetism and gravity. The idea is to use a geometry with a pseudo Riemannian metric of signature (3,1), vanishing curvature, and non vanishing …   Wikipedia

  • Frederick Charles Frank — Sir Frederick Charles Frank FRS[1] (6 March 1911–5 April 1998) was a British theoretical physicist.[2] He was born in Durban, South Africa, although his parents returned to England soon afterwards. He was educated at Thetford Grammar School and… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”