Behavior of the layer compression modulus as a function of frequency near the nematic-smectic-A and re-entrant nematic-smectic-A phase transitions

被引：10

作者：

Rogez, D ^{[1
]}

Collin, D ^{[1
]}

Martinoty, P ^{[1
]}

机构：

[1] Univ Strasbourg 1, Lab Dynam Fluides Complexes, CNRS, UMR 7506, F-67070 Strasbourg, France

来源：

EUROPEAN PHYSICAL JOURNAL E | 2004年 / 14卷 / 01期

关键词：

D O I：

10.1140/epje/i2004-10004-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A progressive cross-over of the layer compression modulus B from a simple power law behavior to a saturation behavior when the frequency is increased from 1 Hz to 2 . 10(3) Hz is observed for the first time near the nematic-smectic-A and the re-entrant nematic-smectic-A phase transitions of a mixture of 4-cyano-4'-(n-hexyloxy)biphenyl and 4-cyano-4'-(n-octyloxy)biphenyl (6OCB-8OCB). This result shows that the saturation of B determined by second sound near the nematic-smectic-A phase transition of a similar mixture is dynamic in nature, and cannot be associated with the static saturation effect predicted by the dislocation loop model, as proposed previously.

引用

页码：43 / 47

页数：5

共 37 条

[1] OBSERVATION OF ALGEBRAIC DECAY OF POSITIONAL ORDER IN A SMECTIC LIQUID-CRYSTAL [J].

ALSNIELSEN, J ;

LITSTER, JD ;

BIRGENEAU, RJ ;

KAPLAN, M ;

SAFINYA, CR ;

LINDEGAARDANDERSEN, A ;

MATHIESEN, S .

PHYSICAL REVIEW B, 1980, 22 (01) :312-320

[2] ANISOTROPIC RENORMALIZATION OF THERMODYNAMIC QUANTITIES ABOVE THE NEMATIC SEMATIC-A PHASE-TRANSITION [J].

ANDERECK, BS ;

PATTON, BR .

PHYSICAL REVIEW E, 1994, 49 (02) :1393-1403

[3] Influence of nematic range on birefringence, heat capacity and elastic modulus near a nematic-smectic-A phase transition [J].

Beaubois, F ;

Claverie, T ;

Marcerou, JP ;

Rouillon, JC ;

Nguyen, HT ;

Garland, CW ;

Haga, H .

PHYSICAL REVIEW E, 1997, 56 (05) :5566-5574

[4] NONVANISHING OF THE LAYER COMPRESSIONAL ELASTIC-CONSTANT AT THE SMECTIC-A TO NEMATIC PHASE-TRANSITION - A CONSEQUENCE OF LANDAU-PEIERLS INSTABILITY [J].

BENZEKRI, M ;

CLAVERIE, T ;

MARCEROU, JP ;

ROUILLON, JC .

PHYSICAL REVIEW LETTERS, 1992, 68 (16) :2480-2483

[5] CRITICAL-BEHAVIOR OF THE LAYER COMPRESSIONAL ELASTIC CONSTANT-B AT THE SMECTIC-A NEMATIC PHASE-TRANSITION [J].

BENZEKRI, M ;

MARCEROU, JP ;

NGUYEN, HT ;

ROUILLON, JC .

PHYSICAL REVIEW B, 1990, 41 (13) :9032-9037

[6] LIGHT-SCATTERING STUDY OF A SMECTIC-A PHASE NEAR SMECTIC-A-NEMATIC TRANSITION [J].

BIRECKI, H ;

SCHAETZING, R ;

RONDELEZ, F ;

LITSTER, JD .

PHYSICAL REVIEW LETTERS, 1976, 36 (23) :1376-1379

[7] PHASE-TRANSITION IN A LATTICE MODEL OF SUPERCONDUCTIVITY [J].

DASGUPTA, C ;

HALPERIN, BI .

PHYSICAL REVIEW LETTERS, 1981, 47 (21) :1556-1560

[8] CRITICAL-BEHAVIOR OF A LATTICE MODEL OF THE NEMATIC TO SMECTIC-A TRANSITION [J].

DASGUPTA, C .

JOURNAL DE PHYSIQUE, 1987, 48 (06) :957-970

[9] HIGH-RESOLUTION X-RAY AND LIGHT-SCATTERING STUDY OF CRITICAL BEHAVIOR ASSOCIATED WITH THE NEMATIC-SMECTIC-A TRANSITION IN 4-CYANO-4'-OCTYLBIPHENYL [J].

DAVIDOV, D ;

SAFINYA, CR ;

KAPLAN, M ;

DANA, SS ;

SCHAETZING, R ;

BIRGENEAU, RJ ;

LITSTER, JD .

PHYSICAL REVIEW B, 1979, 19 (03) :1657-1663

[10] DISLOCATIONS AND THE NEMATIC TO SMECTIC-A TRANSITION FOR ARBITRARY VALUES OF K1 [J].

DAY, AR ;

LUBENSKY, TC ;

MCKANE, AJ .

PHYSICAL REVIEW A, 1983, 27 (03) :1461-1467

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