Electromagnetic description of three-dimensional time-reversal invariant ponderable topological insulators
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Fecha
2016-10
Autores
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
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Editor
American Physical Society
Nombre de Curso
Licencia CC
Licencia CC
Resumen
A general technique to analyze the classical interaction between ideal topological insulators, and
electromagnetic sources and fields, has been previously elaborated. Nevertheless it is not immediately
applicable in the laboratory as it fails to describe real ponderable media. In this work we provide a
description of real topologically insulating materials taking into account their dielectric and magnetic
properties. For inhomogeneous permittivity and permeability, the problem of finding the Green’s function
must be solved in an ad hoc manner. Nevertheless, the physically feasible cases of piecewise constant ε, μ
and θ make the problem tractable, where θ encodes the topological magnetoelectric polarizability
properties of the medium. To this end we employ the Green’s function method to find the fields resulting
from the interaction between these materials and electromagnetic sources. Furthermore we exploit the fact
that in the cases here studied, the full Green’s function can be successfully found if the Green’s function of
the corresponding ponderable media with θ ¼ 0 is known. Our results satisfactorily reproduce previously
existing ones and also generalize some others. The method here elaborated can be exploited to determine
the electromagnetic fields for more general configurations aiming to measure the interaction between real
3D topological insulators and electromagnetic fields.
Notas
Indexación: Scopus.
Palabras clave
Effective Field Theory, Topological Insulators, Magnetoelectric Efect, Topological Field Theories
Citación
Physical Review D. Volume 94, Issue 8. 21 October 2016. Article number 085019
DOI
10.1103/PhysRevD.94.085019