TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCore.4.3.023
TI  - Axion Mie theory of electron energy loss spectroscopy in topological insulators
PY  - 2021/09/14
UR  - https://www.scipost.org/SciPostPhysCore.4.3.023
JF  - SciPost Physics Core
JA  - SciPost Phys. Core
VL  - 4
IS  - 3
SP  - 023
A1  - Schultz, Johannes
AU  - Nogueira, Flavio
AU  - Büchner, Bernd
AU  - van den Brink, Jeroen
AU  - Lubk, Axel
AB  - Electronic topological states of matter exhibit novel types of responses to electromagnetic fields. The response of strong topological insulators, for instance, is characterized by a so-called axion term in the electromagnetic Lagrangian which is ultimately due to the presence of topological surface states. Here we develop the axion Mie theory for the electromagnetic response of spherical particles including arbitrary sources of fields, i.e., charge and current distributions. We derive an axion induced mixing of transverse magnetic and transverse electric modes which are experimentally detectable through small induced rotations of the field vectors. Our results extend upon previous analyses of the problem. Our main focus is on the experimentally relevant problem of electron energy loss spectroscopy in topological insulators, a technique that has so far not yet been used to detect the axion electromagnetic response in these materials.
ER  -

@Article{10.21468/SciPostPhysCore.4.3.023,
	title={{Axion Mie theory of electron energy loss spectroscopy in topological insulators}},
	author={Johannes Schultz and Flavio S. Nogueira and Bernd Büchner and Jeroen van den Brink and Axel Lubk},
	journal={SciPost Phys. Core},
	volume={4},
	pages={023},
	year={2021},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCore.4.3.023},
	url={https://scipost.org/10.21468/SciPostPhysCore.4.3.023},
}