scholarly journals Nondielectric long-range solvation of polar liquids in cubic symmetry

2009 ◽  
Vol 131 (16) ◽  
pp. 164507 ◽  
Author(s):  
Joakim Stenhammar ◽  
Per Linse ◽  
Gunnar Karlström
Keyword(s):  
Long Range ◽  
Polar Liquids ◽  
Cubic Symmetry

scholarly journals Long-range dipolar order and dispersion forces in polar liquids

2017 ◽  
Vol 147 (19) ◽  
pp. 194503 ◽  
Author(s):  
Quinn Alexander Besford ◽  
Andrew Joseph Christofferson ◽  
Maoyuan Liu ◽  
Irene Yarovsky
Keyword(s):  
Long Range ◽  
Dispersion Forces ◽  
Polar Liquids ◽  
Dipolar Order

Fullerene Superconductors: Effects of Molecular Orientation and Valence

1994 ◽  
Vol 359 ◽  
Author(s):  
T. Yildirim ◽  
L. Barbedette ◽  
K. KniaŹ ◽  
J. E. Fischer ◽  
C. L. Lin ◽  
...  
Keyword(s):  
High Resolution ◽  
Raman Scattering ◽  
Long Range ◽  
Molecular Orientation ◽  
Alkaline Earth ◽  
X Ray Diffraction ◽  
Cubic Symmetry ◽  
X Ray ◽  
Mixed Alkali ◽  
Theoretical Predictions

ABSTRACTWe report results of high-resolution x-ray diffraction, dc magnetometry and Raman scattering on the quaternary alkali and ternary mixed alkali-alkaline earth fullerene compounds Na2RbxCs1−x C60 (0 < x < 1) and Rb3−δ BaδC60 (δ ∼ 0.4 and 2.0). These have the same cubic space lattices as K3C60 and Rb3C60 however the former exhibit long-range orientational correlations with Pa3 symmetry and the latter have N > 3 delocalized electrons per molecule. We show that the dependence of Tc on lattice constant is much steeper for the ordered as compared to the merohedrally disordered phases with N = 3, and that within the constraint of cubic symmetry Tc decreases significantly with increasing N > 3, in disagreement with some theoretical predictions.

The need of electron microscopy in the study of domains and domain walls in ferroelectrics

1994 ◽  
Vol 52 ◽  
pp. 550-551
Author(s):  
Wenwu Cao
Keyword(s):  
Domain Wall ◽  
Domain Walls ◽  
High Mobility ◽  
Continuum Theory ◽  
Polarization Vector ◽  
Ferroelectric Materials ◽  
Dielectric Constants ◽  
Nonlocal Coupling ◽  
Cubic Symmetry ◽  
Gradient Energy

Domain structures play a key role in determining the physical properties of ferroelectric materials. The formation of these ferroelectric domains and domain walls are determined by the intrinsic nonlinearity and the nonlocal coupling of the polarization. Analogous to soliton excitations, domain walls can have high mobility when the domain wall energy is high. The domain wall can be describes by a continuum theory owning to the long range nature of the dipole-dipole interactions in ferroelectrics. The simplest form for the Landau energy is the so called ϕ model which can be used to describe a second order phase transition from a cubic prototype,where Pi (i =1, 2, 3) are the components of polarization vector, α's are the linear and nonlinear dielectric constants. In order to take into account the nonlocal coupling, a gradient energy should be included, for cubic symmetry the gradient energy is given by,

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