EXTENDED ISOTROPIC-TO-ANISOTROPIC CROSSOVER ABOVE THE NEMATIC SMECTIC-A PHASE-TRANSITION

被引：41

作者：

PATTON, BR ^{[1
]}

ANDERECK, BS ^{[1
]}

机构：

[1] OHIO WESLEYAN UNIV,DEPT PHYS & ASTRON,DELAWARE,OH 43015

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.69.1556

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We perform a one-loop, self-consistent calculation of the density-wave and director fluctuations above the nematic-smectic-A phase transition, find the renormalization of the perpendicular and parallel correlation lengths, and for the first time calculate values of the anisotropic critical-point exponents nu-parallel-to and nu-perpendicular-to. As the transition is approached several distinct regions of scaling behavior are found with increasingly anisotropic critical behavior. A plot of effective exponents from experiment versus the anisotropy ratio nu-parallel-to/nu-perpendicular-to reveals a systematic correlation that agrees with our calculation.

引用

页码：1556 / 1559

页数：4

共 28 条

[21] CORRELATIONS AT THE NEMATIC TO SMECTIC-A CRITICAL POINT WHEN nu parallel equals 2 nu PERPEND . [J].

Lubensky, T.C. ;

McKane, A.J. .

Journal de physique. Lettres, 1982, 43 (07) :217-221

[22] LIGHT-SCATTERING STUDY OF THE NEMATIC TWIST CONSTANT NEAR THE SMECTIC-A TRANSITION [J].

MAHMOOD, R ;

BRISBIN, D ;

KHAN, I ;

GOODEN, C ;

BALDWIN, A ;

JOHNSON, DL ;

NEUBERT, ME .

PHYSICAL REVIEW LETTERS, 1985, 54 (10) :1031-1034

[23] MEASUREMENT OF SMECTIC-A-PHASE ORDER-PARAMETER FLUCTUATIONS NEAR A SECOND-ORDER SMECTIC-A-NEMATIC-PHASE TRANSITION [J].

MCMILLAN, WL .

PHYSICAL REVIEW A, 1973, 7 (04) :1419-1422

[24]

NELSON DR, 1981, PHYS REV B, V24, P63

[25] CRITICAL AND TRICRITICAL BEHAVIOR AT THE NEMATIC TO SMECTIC-A TRANSITION [J].

OCKO, BM ;

BIRGENEAU, RJ ;

LITSTER, JD ;

NEUBERT, ME .

PHYSICAL REVIEW LETTERS, 1984, 52 (03) :208-211

[26] CRITICAL FLUCTUATIONS NEAR A NEMATIC-SMECTIC-A-SMECTIC-C MULTICRITICAL POINT [J].

SAFINYA, CR ;

BIRGENEAU, RJ ;

LITSTER, JD ;

NEUBERT, ME .

PHYSICAL REVIEW LETTERS, 1981, 47 (09) :668-671

[27] RENORMALIZATION-GROUP TREATMENT OF THE DISLOCATION LOOP MODEL OF THE SMECTIC-A-NEMATIC TRANSITION [J].

TONER, J .

PHYSICAL REVIEW B, 1982, 26 (01) :462-465

[28] LIGHT-SCATTERING STUDY OF TWIST FLUCTUATIONS NEAR THE NEMATIC SMECTIC-A TRANSITION OF DIHEXYLAZOXYBENZENE [J].

VITHANA, HKM ;

SURENDRANATH, V ;

LEWIS, M ;

BALDWIN, A ;

EIDNER, K ;

MAHMOOD, R ;

JOHNSON, DL .

PHYSICAL REVIEW A, 1990, 41 (04) :2031-2037

← 1 2 3 →