Thermal fluctuations of freely suspended smectic-A films from mesoscopic to molecular length scales

被引：31
作者：
Mol, EAL [1 ]
Wong, GCL [1 ]
Petit, JM [1 ]
Rieutord, F [1 ]
deJeu, WH [1 ]
机构：
[1] UNIV GRENOBLE 1, CEA,CNRS,UMR 585, DEPT RECH FONDEMANTALE MATIERE CONDENSEE, F-38054 GRENOBLE, FRANCE
来源：
PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 18期
关键词：
D O I：
10.1103/PhysRevLett.79.3439
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The thermal fluctuations of freely suspended smectic-A films have been studied with diffuse x-ray scattering. Using a (2 + 2) scattering geometry at a synchrotron source the spectral dependence of the displacement-displacement correlation function has been determined from mesoscopic to molecular dimensions. At long in-plane length scales the fluctuations of the smectic layers were found to be conformal; i.e., all layers of the film fluctuated in unison. At decreasing length scales conformality was progressively lost, starting between the top and bottom layers of the film.
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页码：3439 / 3442
页数：4
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