Opin vísindi

Dynamic impurities in two-dimensional topological-insulator edge states

Dynamic impurities in two-dimensional topological-insulator edge states


Title: Dynamic impurities in two-dimensional topological-insulator edge states
Author: Wozny, Simon
Leijnse, Martin
Erlingsson, Sigurdur I.
Date: 2021-11-15
Language: English
Scope: 10
Department: Department of Engineering
Series: Physical Review B; 104(20)
ISSN: 2469-9950
DOI: https://doi.org/10.1103/PhysRevB.104.205418
Subject: Segulmagn; Rafstraumur; Einangrar; Leiðni; Electric insulators; Magnetism; Transmission; Electronic, Optical and Magnetic Materials; Condensed Matter Physics
URI: https://hdl.handle.net/20.500.11815/3375

Show full item record

Citation:

Wozny , S , Leijnse , M & Erlingsson , S I 2021 , ' Dynamic impurities in two-dimensional topological-insulator edge states ' , Physical Review B , vol. 104 , no. 20 , 205418 . https://doi.org/10.1103/PhysRevB.104.205418

Abstract:

Helical edge states of two-dimensional topological insulators show a gap in the density of states (DOS) and suppressed conductance in the presence of ordered magnetic impurities. Here we will consider the dynamical effects on the DOS and transmission when the magnetic impurities are driven periodically. Using the Floquet formalism and Green's functions, the system properties are studied as a function of the driving frequency and the potential energy contribution of the impurities. We see that increasing the potential part closes the DOS gap for all driving regimes. The transmission gap is also closed, showing a pronounced asymmetry as a function of energy. These features indicate that the dynamical transport properties could yield valuable information about the magnetic impurities.

Description:

Funding Information: S.I.E. acknowledges support from the Reykjavik University Research Fund; M.L. and S.W. acknowledge support from the Knut och Alice Wallenbergs Stiftelse (Project No. 2016.0089) and from the Vetenskapsrådet (VR). Publisher Copyright: © 2021 American Physical Society.

Files in this item

This item appears in the following Collection(s)