Impurity modes in Frenkel exciton systems with dipolar interactions and cubic symmetry

2013 ◽  
Vol 138 (16) ◽  
pp. 164507 ◽  
Author(s):  
I. Avgin ◽  
D. L. Huber
Keyword(s):  
Frenkel Exciton ◽  
Dipolar Interactions ◽  
Cubic Symmetry ◽  
Impurity Modes

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,

Magnetic and magnetoelastic properties of a ferromagnetic single crystal with cubic symmetry

1978 ◽  
Vol 3 ◽  
pp. 479-501 ◽  
Author(s):  
E. Du Trémolet de Lacheisserie ◽  
P. Morin ◽  
J. Rouchy
Keyword(s):  
Single Crystal ◽  
Cubic Symmetry ◽  
Magnetoelastic Properties

THE MAGNETIC PROPERTIES OF A FERROFLUID WITH DIPOLAR INTERACTIONS

1985 ◽  
Vol 46 (C6) ◽  
pp. C6-283-C6-286
Author(s):  
A. Bradbury ◽  
S. Menear ◽  
R. W. Chantrell ◽  
K. O'Grady
Keyword(s):  
Magnetic Properties ◽  
Dipolar Interactions

Efficient Treatment of Fixed and Induced Dipolar Interactions

2000 ◽  
Vol 653 ◽  
Author(s):  
Celeste Sagui ◽  
Thoma Darden
Keyword(s):  
Molecular Dynamics ◽  
Md Simulations ◽  
Lagrangian Formalism ◽  
Dipolar Interactions ◽  
Time Step ◽  
Efficient Treatment ◽  
Particle Mesh Ewald ◽  
Fixed Charges ◽  
Self Consistency ◽  
Induced Dipoles

AbstractFixed and induced point dipoles have been implemented in the Ewald and Particle-Mesh Ewald (PME) formalisms. During molecular dynamics (MD) the induced dipoles can be propagated along with the atomic positions either by interation to self-consistency at each time step, or by a Car-Parrinello (CP) technique using an extended Lagrangian formalism. The use of PME for electrostatics of fixed charges and induced dipoles together with a CP treatment of dipole propagation in MD simulations leads to a cost overhead of only 33% above that of MD simulations using standard PME with fixed charges, allowing the study of polarizability in largemacromolecular systems.

scholarly journals Enhancement of Parametric Effects in Polariton Waveguides Induced by Dipolar Interactions

2021 ◽  
Vol 126 (13) ◽  
Author(s):  
D. G. Suárez-Forero ◽  
F. Riminucci ◽  
V. Ardizzone ◽  
N. Karpowicz ◽  
E. Maggiolini ◽  
...  
Keyword(s):  
Dipolar Interactions ◽  
Parametric Effects

scholarly journals An Unexpected Cubic Symmetry in Group IV Alloys Prepared Using Pressure and Temperature

2021 ◽  
Vol 60 (16) ◽  
pp. 9009-9014
Author(s):  
George Serghiou ◽  
Hans Josef Reichmann ◽  
Nicholas Odling ◽  
Kristina Spektor ◽  
Anna Pakhomova ◽  
...  
Keyword(s):  
Group Iv ◽  
Cubic Symmetry

scholarly journals Quasiclassical calculations of Landau level spectrum for 20.5-nm-wide H gTe quantum well: “extremum loop” model and effects of cubic symmetry

2021 ◽  
Vol 47 (1) ◽  
pp. 7-13
Author(s):  
S. V. Gudina ◽  
A. S. Bogolubskiy ◽  
V. N. Neverov ◽  
K. V. Turutkin ◽  
N. G. Shelushinina ◽  
...  
Keyword(s):  
Quantum Well ◽  
Landau Level ◽  
Loop Model ◽  
Cubic Symmetry ◽  
Level Spectrum

Effect of lattice distortion on impurity modes

1978 ◽  
Vol 11 (2) ◽  
pp. 241-244 ◽  
Author(s):  
N Chandralekha Devi ◽  
S N Behera
Keyword(s):  
Lattice Distortion ◽  
Impurity Modes
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