Mean-field theory of isotropic-uniaxial nematic-biaxial nematic phase transitions in an external field

Mukherjee Prabir K.; De Arnab Kumar; Mandal Amitabha

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Mean-field theory of isotropic-uniaxial nematic-biaxial nematic phase transitions in an external field

机译：外场各向同性 - 单轴向外性 - 双轴向内转型的平均场理论

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We present a simple mean-field theory to study the effects of an external magnetic field on biaxial nematic liquid crystals. Isotropic-uniaxial nematic-biaxial nematic phase sequence in an external magnetic field is described. We determine the temperature-field phase diagrams. The model predicts two new phase diagrams. It is shown that in the presence of the magnetic field, the first order uniaxial nematic to biaxial nematic and isotropic to uniaxial nematic phase transitions become second order transition at a tricritical point.

机译：我们提出了一种简单的平均场理论，用于研究外部磁场对双轴向列液晶的影响。描述了外部磁场中的各向同性 - 单轴向偏心 - 双轴序列序列。我们确定温度场相图。该模型预测了两个新的相图。结果表明，在磁场的存在下，单轴向列向非轴向列和各向同性的单轴向列相转变变为三角型转变。

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《Physica Scripta: An International Journal for Experimental and Theoretical Physics》 |2019年第2期|共4页
作者
Mukherjee Prabir K.; De Arnab Kumar; Mandal Amitabha;
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作者单位

Govt Coll Engn &

Text Technol Dept Phys 12 William Carey Rd Serampore 712201 Hooghly India;

Govt Coll Engn &

Text Technol Dept Math 12 William Carey Rd Serampore 712201 Hooghly India;

Panihati Mahavidyalaya Dept Comp Sci Barasat Rd PO Sodepur Kolkata 700110 India;

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原文格式 PDF
正文语种 eng
中图分类物理学;
关键词
liquid crystals; phase transition; tricritical point;

机译：液晶;相转变;三分基点;

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1. Mean-field theory of isotropic-uniaxial nematic-biaxial nematic phase transitions in an external field [J] . Mukherjee Prabir K., De Arnab Kumar, Mandal Amitabha Physica Scripta: An International Journal for Experimental and Theoretical Physics . 2019,第2期

机译：外场各向同性 - 单轴向外性 - 双轴向内转型的平均场理论
2. Refractive index measurements in a reentrant discotic nematic-biaxial nematic phase transition [J] . Braga W. S., Luders D. D., Santos O. R., Phase Transitions . 2018,第8期

机译：折射指数测量在旋转椎间盘性偏心 - 双轴型转变中的折射率测量
3. Miscibility studies of two twist-bend nematic liquid crystal dimers with different average molecular curvatures. A comparison between experimental data and predictions of a Landau mean-field theory for the N-TB-N phase transition [J] . Lopez D. O., Robles-Hernandez B., Salud J., Physical chemistry chemical physics: PCCP . 2016,第6期

机译：两个具有不同平均分子曲率的扭曲弯曲向列液晶二聚体的混溶性研究。 N-TB-N相变实验数据与Landau平均场理论预测之间的比较
4. INTERPRETING AND MODELING MAGNETOCALORIC DATA AND PROPERTIES: THE LANDAU THEORY OF PHASE TRANSITIONS AND MEAN-FIELD THEORY [C] . J.S. AMARAL, V.S. AMARAL 2nd international conference on magnetic refrigeration at room temperature . 2007

机译：磁热数据和性质的解释和建模：相变的朗道理论和中场理论
5. Dynamical mean-field theory studies of metal-insulator transition and superconductivity in strongly correlated electron systems. [D] . Watanabe, Hitoshi. 2001

机译：强相关电子系统中金属-绝缘体跃迁和超导性的动态平均场理论研究。
6. Calorimetric glass transition in a mean-field theory approach [O] . Manuel Sebastian Mariani, Giorgio Parisi, Corrado Rainone 2015

机译：平均场理论方法中的量热玻璃化转变
7. Miscibility studies of two twist-bend nematic liquid crystal dimers with different average molecular curvatures. A comparison between experimental data and predictions of a Landau mean-field theory for the NTB-N phase transition [O] . López Pérez, David Orencio, Robles Hernández, Beatriz, Salud Puig, Josep, 2016

机译：两种具有不同平均分子曲率的扭曲向列液晶二聚体的混溶性研究。实验数据与Landau平均场理论对NTB-N相变的预测之间的比较
8. Phase Transitions and Mean-Field Methods in Lattice Gauge Theory [R] . Greensite, J., Lautrup, B. 1981

机译：格点规范理论中的相变和平均场方法

Mean-field theory of isotropic-uniaxial nematic-biaxial nematic phase transitions in an external field

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