- hexatic
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Describing several forms of liquid crystal that have in-plane short-range positional molecular order, weakly coupled two-dimensional layers and long-range bond orientational molecular order
Wikipedia foundation.
Wikipedia foundation.
Hexatic phase — The hexatic phase is a phase that is between the solid and the isotropic liquid phases. It is characterized by two order parameter: a short range positional and a quasi long range orientational (sixfold) order.The existence of the hexatic phase… … Wikipedia
Colloidal crystal — A colloidal crystal is an ordered array of colloid particles, analogous to a standard crystal whose repeating subunits are atoms or molecules.[1] A natural example of this phenomenon can be found in the gem opal, where spheres of silica assume a… … Wikipedia
Liquid crystal — Schlieren texture of liquid crystal nematic phase Liquid crystals (LCs) are a state of matter that have properties between those of a conventional liquid and those of a solid crystal.[1] For instance, an LC may flow like a liquid, but its… … Wikipedia
XY model — Like the famous Ising and Heisenberg models, the XY model is one of the many highly simplified models in statistical mechanics. It is a special case of the n vector model. In the XY model, 2D classical spins mathbf{s} i are confined to some… … Wikipedia
Bertrand Halperin — Bertrand I. Halperin is the Hollis Professor of Mathematics and Natural Philosophy at the physics department of Harvard University.He grew up in Crown Heights, Brooklyn. He attended Harvard University (class of 1961), and did his graduate work at … Wikipedia
Robijn Bruinsma — Robijn F. Bruinsma (b. May 15, 1953, Haarlem, The Netherlands) is a theoretical physicist and is Professor of Physics at the University of California at Los Angeles and Chair of the Department of Theoretical Physics for the Life Sciences at… … Wikipedia
Bertrand Halperin — Bertrand Israel Halperin (* 6. Dezember 1941 in Brooklyn) ist ein US amerikanischer Physiker. Inhaltsverzeichnis 1 Leben und W … Deutsch Wikipedia
liquid crystal — a liquid having certain crystalline characteristics, esp. different optical properties in different directions when exposed to an electric field. [1890 95] * * * Substance that flows like a liquid but maintains some of the ordered structure… … Universalium
Selected phases characteristic of liquid-crystal-forming molecules — ▪ Table Selected phases characteristic of liquid crystal forming molecules phase order isotropic liquid full continuous translational and rotational symmetry nematic molecular orientation breaks rotational symmetry untilted tilted smectic A… … Universalium
Classical XY model — The classical XY model (sometimes also called classical rotor (rotator) model or O(2) model) is a model of statistical mechanics. It is the special case of the n vector model for n = 2. Contents 1 Definition 2 General properties 2.1 One dimension … Wikipedia