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6 papers · 2 filters
Aging of poled ferroelectric ceramics due to relaxation of random depolarization fields by space-charge accumulation near grain boundaries
Yu. A. Genenko, J. Glaum, O. Hirsch +3
Migration of charged point defects triggered by the local random depolarization field is shown to plausibly explain aging of poled ferroelectric ceramics providing reasonable time…
Cartan's spiral staircase in physics and, in particular, in the gauge theory of dislocations
Markus Lazar, Friedrich W. Hehl
In 1922, Cartan introduced in differential geometry, besides the Riemannian curvature, the new concept of torsion. He visualized a homogeneous and isotropic distribution of torsion…
Charge carrier injection into insulating media: single-particle versus mean-field approach
Yu. A. Genenko, S. V. Yampolskii, C. Melzer +2
Self-consistent, mean-field description of charge injection into a dielectric medium is modified to account for discreteness of charge carriers. The improved scheme includes both t…
Magnetism in Re-based ferrimagnetic double perovskites
A. Winkler, N. Narayanan, D. Mikhailova +9
We have investigated spin and orbital magnetic moments of the Re 5d ion in the double perovskites A2FeReO6 (A = Ba, Sr, Ca) by X-ray magnetic circular dichroism (XMCD) at the Re L(…
The gauge theory of dislocations: a uniformly moving screw dislocation
Markus Lazar
In this paper we present the equations of motion of a moving screw dislocation in the framework of the translation gauge theory of dislocations. In the gauge field theoretical form…
On the Higgs mechanism and stress functions in the translational gauge theory of dislocations
Markus Lazar
In this letter we discuss the Higgs mechanism in the linear and static translational gauge theory of dislocations. We investigate the role of the Nambu-Goldstone field and the Proc…