Reorientation effect on the current-voltage characteristics of a nematic cell

被引：4

作者：

Atasiei, R. ^{[2
]}

Alexe-Ionescu, A. L. ^{[2
]}

Dascalu, C. ^{[2
]}

Dias, J. C. ^{[1
]}

de Souza, R. Teixeira ^{[1
]}

机构：

[1] Univ Estadual Maringa, Dept Fis, BR-87020900 Maringa, Parana, Brazil

[2] Univ Politech Bucharest, Fac Sci Appl, Ro 060042, Romania

来源：

PHYSICS LETTERS A | 2008年 / 372卷 / 39期

关键词：

Liquid crystals; Current measurements; Phase transition;

D O I：

10.1016/j.physleta.2008.08.006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Possible mechanisms explaining the character of the relation I = I(V) for a nematic cell subjected to a large electric field are discussed, taking into account the reorientation effect of the nematic director induced by the external electric field. The analysis is performed in the quasi-static regime where the nematic orientation follows the time variation of the external field without delay. The time variation of the equivalent capacitance of the cell is equivalent to a pure resistance, and is responsible for a current peak when the applied voltage overcomes the threshold voltage for the transition of Freedericksz. (c) 2008 Published by Elsevier B.V.

引用

页码：6116 / 6120

页数：5

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