edoc

Magnonic Quadrupole Topological Insulator in Antiskyrmion Crystals

Hirosawa, Tomoki and Díaz, Sebastián A. and Klinovaja, Jelena and Loss, Daniel. (2020) Magnonic Quadrupole Topological Insulator in Antiskyrmion Crystals. Physical Review Letters, 125 (20). p. 207204.

Full text not available from this repository.

Official URL: https://edoc.unibas.ch/80679/

Downloads: Statistics Overview

Abstract

We uncover that antiskyrmion crystals provide an experimentally accessible platform to realize a magnonic quadrupole topological insulator, whose hallmark signatures are robust magnonic corner states. Furthermore, we show that tuning an applied magnetic field can trigger the self-assembly of antiskyrmions carrying a fractional topological charge along the sample edges. Crucially, these fractional antiskyrmions restore the symmetries needed to enforce the emergence of the magnonic corner states. Using the machinery of nested Wilson loops, adapted to magnonic systems supported by noncollinear magnetic textures, we demonstrate the quantization of the bulk quadrupole moment, edge dipole moments, and corner charges.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretical Nano/Quantum Physics (Klinovaja)
UniBasel Contributors:Klinovaja, Jelena
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
ISSN:0031-9007
e-ISSN:1079-7114
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:20 Apr 2021 15:43
Deposited On:20 Apr 2021 15:43

Repository Staff Only: item control page