Topological excitations in a kagome magnet

Manuel Pereiro, Dmitry Yudin, Jonathan Chico, Corina Etz, Olle Eriksson, Anders Bergman

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)

Abstract

Chirality - that is, left or right handedness - is present in many scientific areas, and particularly in condensed matter physics. Inversion symmetry breaking relates chirality with skyrmions, which are protected field configurations with particle-like and topological properties. Here we show that a kagome magnet, with Heisenberg and Dzyaloshinskii-Moriya interactions, causes non-trivial topological and chiral magnetic properties. We also find that under special circumstances, skyrmions emerge as excitations, having stability even at room temperature. Chiral magnonic edge states of a kagome magnet offer, in addition, a promising way to create, control and manipulate skyrmions. This has potential for applications in spintronics, that is, for information storage or as logic devices. Collisions between these particle-like excitations are found to be elastic at very low temperature in the skyrmion-skyrmion channel, albeit without mass-conservation. Skyrmion-antiskyrmion collisions are found to be more complex, where annihilation and creation of these objects have a distinct non-local nature.

Original languageEnglish
Article number4815
JournalNature Communications
Volume5
DOIs
Publication statusPublished - 8 Sep 2014
Externally publishedYes

Fingerprint

Dive into the research topics of 'Topological excitations in a kagome magnet'. Together they form a unique fingerprint.

Cite this