51 research outputs found
Polarons as stable solitary wave solutions to the Dirac-Coulomb system
We consider solitary wave solutions to the Dirac--Coulomb system both from
physical and mathematical points of view. Fermions interacting with gravity in
the Newtonian limit are described by the model of Dirac fermions with the
Coulomb attraction. This model also appears in certain condensed matter systems
with emergent Dirac fermions interacting via optical phonons. In this model,
the classical soliton solutions of equations of motion describe the physical
objects that may be called polarons, in analogy to the solutions of the
Choquard equation. We develop analytical methods for the Dirac--Coulomb system,
showing that the no-node gap solitons for sufficiently small values of charge
are linearly (spectrally) stable.Comment: Latex, 26 page
Fabrication and characterization of free-standing thick-film piezoelectric cantilevers for energy harvesting
Effect of different alcohols, gelatinizing times, calcination and microwave on characteristics of TiO2 nanoparticles synthesized by sol–gel method
A parametric study on flexible electro-active composites: Importance of geometry and matrix properties
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