Bound-states and polarized charged zero modes in three-dimensional topological insulators induced by a magnetic vortex
Abstract
By coating a three-dimensional topological insulator (TI) with a ferromagnetic film supporting an in-plane magnetic vortex, one breaks the time-reversal symmetry (TRS) without generating a mass gap. It rather yields electronic states bound to the vortex center which have different probabilities associated with each spin mode. In addition, its associate current (around the vortex center) is partially polarized with an energy gap separating the most excited bound state from the scattered ones. Charged zero-modes also appear as fully polarized modes localized near the vortex center. From the magnetic point of view, the observation of such a special current in a TI-magnet sandwich comes about as an alternative technique for detecting magnetic vortices in magnetic thin films.
Keywords
Cite
@article{arxiv.1210.3100,
title = {Bound-states and polarized charged zero modes in three-dimensional topological insulators induced by a magnetic vortex},
author = {Jakson M. Fonseca and Winder A. Moura-Melo and Afranio R. Pereira},
journal= {arXiv preprint arXiv:1210.3100},
year = {2016}
}
Comments
8 pages, 3 figures, new version with more discussions and results accepted for publication in The European Physical Journal B