dc.contributor.author
Madsen, Kevin A.
dc.contributor.author
Brouwer, Piet W.
dc.contributor.author
Recher, Patrik
dc.contributor.author
Silvestrov, Peter G.
dc.date.accessioned
2022-05-17T12:21:49Z
dc.date.available
2022-05-17T12:21:49Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/34515
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-34233
dc.description.abstract
The interaction of a magnetic insulator with the helical electronic edge of a two-dimensional topological insulator has been shown to lead to many interesting phenomena. One of these is that for a suitable orientation of the magnetic anisotropy axis, the exchange coupling to an easy-plane magnet has no effect on DC electrical transport through a helical edge, despite the fact that it opens a gap in the spectrum of the helical edge [Meng et al., Phys. Rev. B 90, 205403 (2014)]. Here, we theoretically consider such a magnet embedded in an interferometer, consisting of a pair of helical edge states connected by two tunneling contacts, at which electrons can tunnel between the two edges. Using a scattering matrix approach, we show that the presence of the magnet in one of the interferometer arms gives rise to AC currents in response to an applied DC voltage. On the other hand, the DC Aharonov-Bohm effect is absent at zero temperature and small DC voltages, and only appears if the applied voltage or the temperature exceeds the magnet-induced excitation gap.
en
dc.format.extent
14 Seiten (Manuskriptversion)
dc.rights.uri
http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen
dc.subject
Aharonov-Bohm effect
en
dc.subject
Magnetic anisotropy
en
dc.subject
Quantum interference effects
en
dc.subject
Spin-orbit coupling
en
dc.subject
Topological insulators
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik::539 Moderne Physik
dc.title
Interference effects induced by a precessing easy-plane magnet coupled to a helical edge state
dc.type
Wissenschaftlicher Artikel
dc.identifier.sepid
86969
dcterms.bibliographicCitation.articlenumber
115142
dcterms.bibliographicCitation.doi
10.1103/PhysRevB.103.115142
dcterms.bibliographicCitation.journaltitle
Physical Review B
dcterms.bibliographicCitation.number
11
dcterms.bibliographicCitation.originalpublishername
American Physical Society
dcterms.bibliographicCitation.originalpublisherplace
College Park, Md
dcterms.bibliographicCitation.volume
103 (2021)
dcterms.bibliographicCitation.url
https://link.aps.org/doi/10.1103/PhysRevB.103.115142
dcterms.rightsHolder.url
https://journals.aps.org/copyrightFAQ.html#free
refubium.affiliation
Physik
refubium.affiliation.other
Institut für Theoretische Physik
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
2469-9950
dcterms.isPartOf.eissn
2469-9969