Journal De Physique最新文献_第4页

Swollen lamellar phases between two solid walls : undulation forces and generation of defects 两个固体壁之间膨胀的片层相:波动力和缺陷的产生

Journal De Physique Pub Date : 1990-11-01 DOI: 10.1051/JPHYS:0199000510220254300

O. Abillon, E. Perez

引用次数: 18

Growth of two dimensional domains in copolymer thin films 共聚物薄膜中二维畴的生长

Journal De Physique Pub Date : 1990-11-01 DOI: 10.1051/JPHYS:0199000510220257100

D. Ausserré, D. Chatenay, G. Coulon, B. Collin

引用次数: 26

On the applicability of the rotational diffusion model in liquid crystalline solvents. A nuclear magnetic relaxation study of toluene 旋转扩散模型在液晶溶剂中的适用性。甲苯的核磁弛豫研究

Journal De Physique Pub Date : 1990-11-01 DOI: 10.1051/JPHYS:0199000510220258100

J. Bulthuis, L. Plomp

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引用次数: 14

Topology of the phase in aperiodic crystals 非周期晶体中相的拓扑结构

Journal De Physique Pub Date : 1990-11-01 DOI: 10.1051/JPHYS:0199000510210243100

M. Kleman

{"title":"Topology of the phase in aperiodic crystals","authors":"M. Kleman","doi":"10.1051/JPHYS:0199000510210243100","DOIUrl":"https://doi.org/10.1051/JPHYS:0199000510210243100","url":null,"abstract":"The phase degrees of freedom of aperiodic crystals (quasicrystals) are far from being understood. In this paper we study in great detail the geometrical and topological properties of the «phase space» of quasicrystals, for usual quasicrystalline symmetries (icosahedral and pentagonal cases) and for the cases d=3, d ∥ =1 and d=4, d ∥ =2. It is shown that the universal covering of the phase space is a curved crystal of negative Gaussian curvature, whose group of automorphisms contains therefore the fundamental group of the phase space as a subgroup. This fundamental group is calculated in each case. The results do not depend in any way on the cho Les degres de liberte relatifs a la phase des cristaux aperiodiques sont loin d'etre compris. Dans cet article, nous etudions en grand detail les proprietes geometriques et topologiques de l'espace representatif de la phase pour des symetries quasicristallines usuelles (icosaedrique et pentagonale) et pour les cas d=3, d ∥ =1 et d=4, d∥=2. On montre que l'espace de la phase a pour revetement universel un cristal d'espace courbe de courbure gaussienne negative; le groupe fondamental de l'espace de la phase est un sous-groupe du groupe d'automorphismes de ce cristal courbe. Nous le calculons dans chaque cas envisage. Les resultats ne dependent en aucune maniere du choix et de la «surface atomique» (le motif) qui decore la cellule de base du cristal hypercubique d'ou le quasicristal est engendre. En consequence, ils ne dependent pas non plus du fait que les phasons sont continus ou discrets. Ces recherches constituent un premier pas necessaire dans l'etude de la nature geometrique et topologique des deformations du type «phason». On discute en outre de l'homomorphisme entre l'espace de la phase et le groupe qui classe les dislocations. Finalement nous indiquons sans entrer dans les details que le groupe fondamental de l'espace de la phase classe les defauts topologiques du type phason","PeriodicalId":14747,"journal":{"name":"Journal De Physique","volume":"3 1","pages":"2431-2447"},"PeriodicalIF":0.0,"publicationDate":"1990-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74930706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Generalization in a Hopfield network Hopfield网络的泛化

Journal De Physique Pub Date : 1990-11-01 DOI: 10.1051/JPHYS:0199000510210242100

J. Fontanari

引用次数: 36

Monte Carlo simulation of collimated beam transmission through turbid media 准直光束通过混浊介质的蒙特卡罗模拟

Journal De Physique Pub Date : 1990-11-01 DOI: 10.1051/JPHYS:0199000510220252100

S. Avrillier, E. Tinet, E. Delettre

引用次数: 21

Theory of the formation of quasicrystals 准晶体形成的理论

Journal De Physique Pub Date : 1990-11-01 DOI: 10.1051/JPHYS:0199000510210239900

V. Dmitriev, Yu. M. Gufan, S. Rochal, R. Toledano

引用次数: 3

A disordered lamellar structure in the isotropic phase of a ternary double-chain surfactant system 三元双链表面活性剂体系各向同性相中的无序层状结构

Journal De Physique Pub Date : 1990-11-01 DOI: 10.1051/JPHYS:0199000510220260500

I. Barnes, P. Dérian, S. Hyde, B. Ninham, T. Zemb

引用次数: 37

Anharmonic theory of a stack of tethered membranes 系留膜堆的非调和理论

Journal De Physique Pub Date : 1990-11-01 DOI: 10.1051/JPHYS:0199000510210240700

E. Guitter

引用次数: 5

Spectral dimension of fluid membranes 流体膜的光谱维数

Journal De Physique Pub Date : 1990-11-01 DOI: 10.1051/JPHYS:0199000510210239500

S. Komura, A. Baumgärtner

引用次数: 3