X-Ray Reflectivity from the Surface of a Liquid Crystal:: Surface Structure and Absolute Value of Critical Fluctuations

P.S. Pershan; Jens Aage Als-Nielsen

doi:10.1103/PhysRevLett.52.759

X-Ray Reflectivity from the Surface of a Liquid Crystal: Surface Structure and Absolute Value of Critical Fluctuations

P.S. Pershan, Jens Aage Als-Nielsen

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Abstract

X-ray reflectivity from the surface of a nematic liquid crystal is interpreted as the coherent superposition of Fresnel reflection from the surface and Bragg reflection from smectic order induced by the surface. Angular dependence of the Fresnel effect yields information on surface structure. Measurement of the intensity of diffuse critical scattering relative to the Fresnel reflection yields the absolute value of the critical part of the density-density correlation function.

Original language	English
Journal	Physical Review Letters
Volume	52
Issue number	9
Pages (from-to)	759-762
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.52.759
Publication status	Published - 1984

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title = "X-Ray Reflectivity from the Surface of a Liquid Crystal:: Surface Structure and Absolute Value of Critical Fluctuations",

abstract = "X-ray reflectivity from the surface of a nematic liquid crystal is interpreted as the coherent superposition of Fresnel reflection from the surface and Bragg reflection from smectic order induced by the surface. Angular dependence of the Fresnel effect yields information on surface structure. Measurement of the intensity of diffuse critical scattering relative to the Fresnel reflection yields the absolute value of the critical part of the density-density correlation function.",

author = "P.S. Pershan and Als-Nielsen, {Jens Aage}",

year = "1984",

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T2 - Surface Structure and Absolute Value of Critical Fluctuations

AU - Pershan, P.S.

AU - Als-Nielsen, Jens Aage

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Y1 - 1984

N2 - X-ray reflectivity from the surface of a nematic liquid crystal is interpreted as the coherent superposition of Fresnel reflection from the surface and Bragg reflection from smectic order induced by the surface. Angular dependence of the Fresnel effect yields information on surface structure. Measurement of the intensity of diffuse critical scattering relative to the Fresnel reflection yields the absolute value of the critical part of the density-density correlation function.

AB - X-ray reflectivity from the surface of a nematic liquid crystal is interpreted as the coherent superposition of Fresnel reflection from the surface and Bragg reflection from smectic order induced by the surface. Angular dependence of the Fresnel effect yields information on surface structure. Measurement of the intensity of diffuse critical scattering relative to the Fresnel reflection yields the absolute value of the critical part of the density-density correlation function.

U2 - 10.1103/PhysRevLett.52.759

DO - 10.1103/PhysRevLett.52.759

M3 - Journal article

SN - 0031-9007

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EP - 762

JO - Physical Review Letters

JF - Physical Review Letters

IS - 9

ER -

X-Ray Reflectivity from the Surface of a Liquid Crystal: Surface Structure and Absolute Value of Critical Fluctuations

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