Pub Date : 1985-11-01DOI: 10.1051/JPHYSLET:0198500460220103700
C. Dominicis, I. Kondor
As building blocks of a field theory to be constructed upon Parisi's mean field solution for an Ising spin glass, the complete set of the Gaussian propagators is given Calcul de l'ensemble complet de propagateurs gaussiens necessaires a la construction de la theorie des champs pour la solution de champ moyen de Parisi pour un verre de spin d'Ising
作为建立在伊辛自旋玻璃的Parisi平均场解基础上的场理论的基础，给出了高斯传播子的完备集:计算系综完备的传播子gaussiens necessures a la construction de la theories des champs pour la solution de champs moyen de Parisi pour un verre de spin d'Ising
{"title":"Gaussian propagators for the Ising spin glass below Tc","authors":"C. Dominicis, I. Kondor","doi":"10.1051/JPHYSLET:0198500460220103700","DOIUrl":"https://doi.org/10.1051/JPHYSLET:0198500460220103700","url":null,"abstract":"As building blocks of a field theory to be constructed upon Parisi's mean field solution for an Ising spin glass, the complete set of the Gaussian propagators is given Calcul de l'ensemble complet de propagateurs gaussiens necessaires a la construction de la theorie des champs pour la solution de champ moyen de Parisi pour un verre de spin d'Ising","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"69 1","pages":"1037-1043"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86858569","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}
Pub Date : 1985-11-01DOI: 10.1051/JPHYSLET:0198500460210102300
A. Lefebvre, P. François, J. Persio
GaAs single crystals have been deformed by compression at room temperature under a confining pressure of 600 MPa. Two competitive mechanisms of plastic deformation are proposed. The first mechanism is supported by the observation of mobile perfect (or slightly dissociated) α dislocations. The second mechanism involves less mobile widely dissociated β (or screw) dislocations. It is suggested that the large dissociation of these dislocations is due to the lower mobility of the 30° (β) partials Deformation d'echantillons GaAs a temperature ambiante et sous une pression de confinement de 600 MPa et proposition de deux mecanismes de deformation plastique. Le premier s'appuie sur l'observation de dislocations α parfaites ou peu dissociees tres mobiles. Le second fait intervenir des dislocations β (ou vis) largement dissociees et moins mobiles. La dissociation de ces dissociations pourrait etre due a une mobilite plus faible des dislocations partielles 30° (β)
在室温下，在600 MPa的围压下，对砷化镓单晶进行压缩变形。提出了塑性变形的两种竞争机制。第一种机制是由观察到的移动完美(或轻微解离)α位错所支持的。第二种机制涉及较少移动的广泛解离的β(或螺钉)位错。本文认为，这些位错的大解离是由于30°(β)偏变形力学GaAs在室温、600 MPa压力约束下的低迁移率以及变形塑性双机制的存在。Le premier ' s applie sur l' s observation de dislocations α - paru disdises - tremobiles。第二个因素是脱臼β(相对于)较大的脱臼和移动。由于一个可移动粒子加上可失效的位错粒子30°(β)， La解离导致解离谱。
{"title":"Transmission electron microscopy of semi-insulating Ga As deformed at room temperature and under confining pressure","authors":"A. Lefebvre, P. François, J. Persio","doi":"10.1051/JPHYSLET:0198500460210102300","DOIUrl":"https://doi.org/10.1051/JPHYSLET:0198500460210102300","url":null,"abstract":"GaAs single crystals have been deformed by compression at room temperature under a confining pressure of 600 MPa. Two competitive mechanisms of plastic deformation are proposed. The first mechanism is supported by the observation of mobile perfect (or slightly dissociated) α dislocations. The second mechanism involves less mobile widely dissociated β (or screw) dislocations. It is suggested that the large dissociation of these dislocations is due to the lower mobility of the 30° (β) partials Deformation d'echantillons GaAs a temperature ambiante et sous une pression de confinement de 600 MPa et proposition de deux mecanismes de deformation plastique. Le premier s'appuie sur l'observation de dislocations α parfaites ou peu dissociees tres mobiles. Le second fait intervenir des dislocations β (ou vis) largement dissociees et moins mobiles. La dissociation de ces dissociations pourrait etre due a une mobilite plus faible des dislocations partielles 30° (β)","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"13 1","pages":"1023-1030"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85195831","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}
Pub Date : 1985-11-01DOI: 10.1051/JPHYSLET:0198500460220107900
F. Creuzet, G. Creuzet, D. Jérome, D. Schweitzer, H. Keller
2014 Nous presentons la premiere observation d’une transition supraconductrice etroite et complete a 8.1 K dans 03B2-(BEDT-TTF)2I3 sous pression atmospherique. Ce resultat est obtenu apres l’application d’une pression hydrostatique en helium gazeux de 1.5 kbar et le relâchement de la pression a basse temperature. Nous apportons des evidences experimentales indiquant l’instabilite au-dessus de 250 K de l’etat metastable responsable a cette supraconduction homogene sous pression atmospherique.
{"title":"Homogeneous superconducting state at 8.1 K under ambient pressure in the organic conductor β-(BEDT-TTF)2I3","authors":"F. Creuzet, G. Creuzet, D. Jérome, D. Schweitzer, H. Keller","doi":"10.1051/JPHYSLET:0198500460220107900","DOIUrl":"https://doi.org/10.1051/JPHYSLET:0198500460220107900","url":null,"abstract":"2014 Nous presentons la premiere observation d’une transition supraconductrice etroite et complete a 8.1 K dans 03B2-(BEDT-TTF)2I3 sous pression atmospherique. Ce resultat est obtenu apres l’application d’une pression hydrostatique en helium gazeux de 1.5 kbar et le relâchement de la pression a basse temperature. Nous apportons des evidences experimentales indiquant l’instabilite au-dessus de 250 K de l’etat metastable responsable a cette supraconduction homogene sous pression atmospherique.","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"5 1","pages":"1079-1085"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78454038","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}
Pub Date : 1985-11-01DOI: 10.1051/JPHYSLET:019850046021099100
C. Baudet, É. Guyon, Y. Pomeau
We approach the geometric dispersion effects in a granular porous medium at large Peclet numbers by first considering the distribution of residence times around a single sphere in a uniform applied velocity field U. We get a logarithmic singularity of the dispersion in U Log U which is due to the slow flow near the stagnation points of the flow field. This feature is independent of the flow structure at large distances from the stagnation points. Thus the result can be applied to a random dilute array of spheres (fixed bed) On decrit des effets singuliers de la dispersion geometrique dans un milieu poreux granulaire aux grands nombres de Peclet
{"title":"Dispersion dans un écoulement de Stokes","authors":"C. Baudet, É. Guyon, Y. Pomeau","doi":"10.1051/JPHYSLET:019850046021099100","DOIUrl":"https://doi.org/10.1051/JPHYSLET:019850046021099100","url":null,"abstract":"We approach the geometric dispersion effects in a granular porous medium at large Peclet numbers by first considering the distribution of residence times around a single sphere in a uniform applied velocity field U. We get a logarithmic singularity of the dispersion in U Log U which is due to the slow flow near the stagnation points of the flow field. This feature is independent of the flow structure at large distances from the stagnation points. Thus the result can be applied to a random dilute array of spheres (fixed bed) On decrit des effets singuliers de la dispersion geometrique dans un milieu poreux granulaire aux grands nombres de Peclet","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"67 1","pages":"991-998"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83591503","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}
Pub Date : 1985-11-01DOI: 10.1051/JPHYSLET:0198500460210100500
J. Meunier
On deduit des mesures ellipsometriques le coefficient de rigidite d'une couche monomoleculaire de surfactant a une interface eau-huile. La monocouche contenant de l'alcool, on trouve une valeur tres faible du coefficient K (K∼k B T). On etudie ensuite les interfaces microemulsion-huile et microemission-eau recouvertes du meme film. On trouve qu'il existe une zone perturbee dans la microemulsion au contact de cette monocouche, zone dont l'epaisseur est comparable a la taille des objets dans la microemulsion. Les resultats experimentaux pour les interfaces de tres faibles tensions interfaciales suggerent que celles-ci peuvent etre decrites par le modele d'interfaces ouvertes recemment proposees
通过椭偏测量，推导出单分子表面活性剂层在水-油界面的刚度系数。由于单层含有酒精，K系数(K ~ K B T)很低，然后研究了同一膜覆盖的微乳液-油和微发射-水界面。在微乳液中发现了与单层接触的扰动区，其厚度与微乳液中物体的大小相当。极低界面张力的实验结果表明，这些可以用最近提出的开放界面模型来描述。
{"title":"Measurement of the rigidity coefficient of a surfactant layer and structure of the oil or water microemulsion interface","authors":"J. Meunier","doi":"10.1051/JPHYSLET:0198500460210100500","DOIUrl":"https://doi.org/10.1051/JPHYSLET:0198500460210100500","url":null,"abstract":"On deduit des mesures ellipsometriques le coefficient de rigidite d'une couche monomoleculaire de surfactant a une interface eau-huile. La monocouche contenant de l'alcool, on trouve une valeur tres faible du coefficient K (K∼k B T). On etudie ensuite les interfaces microemulsion-huile et microemission-eau recouvertes du meme film. On trouve qu'il existe une zone perturbee dans la microemulsion au contact de cette monocouche, zone dont l'epaisseur est comparable a la taille des objets dans la microemulsion. Les resultats experimentaux pour les interfaces de tres faibles tensions interfaciales suggerent que celles-ci peuvent etre decrites par le modele d'interfaces ouvertes recemment proposees","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"12 1","pages":"1005-1014"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81818449","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}
Pub Date : 1985-11-01DOI: 10.1051/JPHYSLET:0198500460210101500
L. Benguigui
{"title":"Dielectric scaling near a percolation threshold","authors":"L. Benguigui","doi":"10.1051/JPHYSLET:0198500460210101500","DOIUrl":"https://doi.org/10.1051/JPHYSLET:0198500460210101500","url":null,"abstract":"","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"13 1","pages":"1015-1021"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87687862","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}
Pub Date : 1985-11-01DOI: 10.1051/JPHYSLET:019850046021098500
G. Paladin, M. Mézard, C. Dominicis
Wa introduce and solve a simple model of hierarchical relaxation: the diffusion by hopping in a regular ultrametric space On introduit et on resout un modele simple de relaxation hierarchique: la diffusion par sauts dans un espace regulier ultrametrique
本文介绍并求解了一种简单的层次松弛模型:在正则超尺度空间中跳跃扩散
{"title":"Diffusion in an ultrametric space : a simple case","authors":"G. Paladin, M. Mézard, C. Dominicis","doi":"10.1051/JPHYSLET:019850046021098500","DOIUrl":"https://doi.org/10.1051/JPHYSLET:019850046021098500","url":null,"abstract":"Wa introduce and solve a simple model of hierarchical relaxation: the diffusion by hopping in a regular ultrametric space On introduit et on resout un modele simple de relaxation hierarchique: la diffusion par sauts dans un espace regulier ultrametrique","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"104 1","pages":"985-989"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83513856","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}
Pub Date : 1985-11-01DOI: 10.1051/JPHYSLET:0198500460220106500
P. Keller, B. Carvalho, J. Cotton, M. Lambert, F. Moussa, G. Pépy
Side chain liquid crystal polymers are studied in the isotropic, nematic and smectic phases. The samples are made from a mixture of liquid crystal polymethacrylate with deuterated or protonated backbones. The samples are studied with neutron diffraction and small angle neutron scattering. The results show in particular that in the aligned smectic phase the backbone is highly anisotropic and confined within a smectic layer. The backbone labelling shows local bilayered order.
{"title":"Side chain mesomorphic polymers : studies of labelled backbones by neutron scattering","authors":"P. Keller, B. Carvalho, J. Cotton, M. Lambert, F. Moussa, G. Pépy","doi":"10.1051/JPHYSLET:0198500460220106500","DOIUrl":"https://doi.org/10.1051/JPHYSLET:0198500460220106500","url":null,"abstract":"Side chain liquid crystal polymers are studied in the isotropic, nematic and smectic phases. The samples are made from a mixture of liquid crystal polymethacrylate with deuterated or protonated backbones. The samples are studied with neutron diffraction and small angle neutron scattering. The results show in particular that in the aligned smectic phase the backbone is highly anisotropic and confined within a smectic layer. The backbone labelling shows local bilayered order.","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"62 1","pages":"1065-1071"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76702494","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}
Pub Date : 1985-11-01DOI: 10.1051/JPHYSLET:0198500460220107300
G. Bonfait, B. Castaing, A. Schuhl, M. Chapellier
We propose a scenario for interpreting the recent experiments on melting of polarized solid 3 He. During a permanent melting, the liquid is formed with the polarization of the bulk solid. Within this interpretation, all the low polarization results agree with the predictions deduced from the well known magnetic susceptibilities of both phases Lors de la fusion permanente, le liquide est forme avec la polarisation du solide loin de l'interface
我们提出了一个场景来解释最近关于极化固体3 He熔化的实验。在永久熔化过程中，液体是随着大块固体的极化而形成的。在这一解释中，所有的低极化结果都与已知的两相磁化率预测相一致:Lors de la fusion permanente, le liquidest form, la polisation du solid loin de l'interface
{"title":"Melting of polarized 3He : interpretation of recent experiments","authors":"G. Bonfait, B. Castaing, A. Schuhl, M. Chapellier","doi":"10.1051/JPHYSLET:0198500460220107300","DOIUrl":"https://doi.org/10.1051/JPHYSLET:0198500460220107300","url":null,"abstract":"We propose a scenario for interpreting the recent experiments on melting of polarized solid 3 He. During a permanent melting, the liquid is formed with the polarization of the bulk solid. Within this interpretation, all the low polarization results agree with the predictions deduced from the well known magnetic susceptibilities of both phases Lors de la fusion permanente, le liquide est forme avec la polarisation du solide loin de l'interface","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"8 1","pages":"1073-1077"},"PeriodicalIF":0.0,"publicationDate":"1985-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76318763","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}
Pub Date : 1985-10-01DOI: 10.1051/JPHYSLET:019850046020097300
P. Pieranski, P. Cladis, R. Barbet-Massin
Experimental evidence for a Blue Phase of hexagonal symmetry is reported. In agreement with a theoretical prediction by Hornreich et al., this new Blue Phase has been found in a short pitch cholesteric liquid crystal of positive dielectric anisotropy submitted to a large enough electric field. Its symmetry, compatible with crystal forms and with Bragg reflections, is either P6 1 22 or P6 2 22. The phase is three-dimensional in contradistinction with theoretically considered two-dimensional models En accord avec les predictions theoriques de Hornreich et al. cette nouvelle phase apparait dans des cristaux liquides cholesteriques de petit pas, d'anisotropie dielectrique positive et soumis au champ electrique d'intensite suffisante
本文报道了六边形对称蓝相的实验证据。与Hornreich等人的理论预测一致，在足够大的电场作用下，在具有正介电各向异性的短间距胆甾液晶中发现了这种新的蓝相。它的对称性，兼容晶体形式和布拉格反射，是P6 1 22或P6 2 22。与理论上考虑的二维模型相比，相是三维的。根据预测理论，de Hornreich等人提出了“nouvelle phase appardans des cristaux liquides choliques de petit pas, d’各向异性介电正等soumis au champ electrique d’intensite suffisante”
{"title":"Experimental evidence for a hexagonal Blue Phase","authors":"P. Pieranski, P. Cladis, R. Barbet-Massin","doi":"10.1051/JPHYSLET:019850046020097300","DOIUrl":"https://doi.org/10.1051/JPHYSLET:019850046020097300","url":null,"abstract":"Experimental evidence for a Blue Phase of hexagonal symmetry is reported. In agreement with a theoretical prediction by Hornreich et al., this new Blue Phase has been found in a short pitch cholesteric liquid crystal of positive dielectric anisotropy submitted to a large enough electric field. Its symmetry, compatible with crystal forms and with Bragg reflections, is either P6 1 22 or P6 2 22. The phase is three-dimensional in contradistinction with theoretically considered two-dimensional models En accord avec les predictions theoriques de Hornreich et al. cette nouvelle phase apparait dans des cristaux liquides cholesteriques de petit pas, d'anisotropie dielectrique positive et soumis au champ electrique d'intensite suffisante","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"15 1","pages":"973-977"},"PeriodicalIF":0.0,"publicationDate":"1985-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78119728","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}
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