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dc.contributor.authorKetterl, A. S.
dc.contributor.authorOtto, Sebastian
dc.contributor.authorBastian, M.
dc.contributor.authorAndres, Beatrice
dc.contributor.authorGahl, Cornelius
dc.contributor.authorMinár, Jan
dc.contributor.authorEbert, Hubert
dc.contributor.authorBraun, Jürgen
dc.contributor.authorTereshchenko, Oleg Evgenievich
dc.contributor.authorKokh, Konstantin A.
dc.contributor.authorFauster, Thomas
dc.contributor.authorWeinelt, Martin
dc.date.accessioned2018-12-21T11:01:09Z-
dc.date.available2018-12-21T11:01:09Z-
dc.date.issued2018
dc.identifier.citationKETTERL, A. S., OTTO, S., BASTIAN, M., ANDRES, B., GAHL, C., MINÁR, J., EBERT, H., BRAUN, J., TERESHCHENKO, O. E., KOKH, K. A., FAUSTER, T., WEINELT, M. Origin of spin-polarized photocurrents in the topological surface states of Bi2 Se3. Physical Review B, 2018, roč. 98, č. 15, s. [1-6]. ISSN 2469-9950.en
dc.identifier.issn2469-9950
dc.identifier.uri2-s2.0-85054573045
dc.identifier.urihttp://hdl.handle.net/11025/30745
dc.description.abstractŠtudovali sme spinovo polarizované foroprúdy v topologickom materiály Bi2Se3. Za pomoci 2PPE ARPES a teoretickými výpočtamy sme zistili že obecně platí, že trojnásobně symetrický dichroický signál nepodporuje jednosměrné fotoproudy. Nicméně, zbytková asymetrie až do 3,5% v našich fotoemisních spektrech je kompatibilní s dříve pozorovanými helickými efektami.cs
dc.format7 s.
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.rights© American Physical Societyen
dc.subjectARPES, topologické izolatory, KKRcs
dc.titleOrigin of spin-polarized photocurrents in the topological surface states of Bi2 Se3en
dc.title.alternativeSpin-polarizované fotoproudy v topologických povrchových stavech Bi 2 Se 3cs
dc.typečlánekcs
dc.typearticleen
dc.rights.accessopenAccessen
dc.type.versionpublishedVersionen
dc.description.abstract-translatedFor the generation of spin-polarized photocurrents in topological insulators, a coupling between photon angular momentum and electron spin is often assumed. Such a coupling seems to be supported by dichroism reported in E(ky)-intensity maps in photoemission. We show in three dimensional two-photon photoemission and one-step photoemission calculations that the circular dichroism is in fact threefold in E(kx,k y) maps although it may appear antisymmetric in E(ky). The threefold symmetry is inconsistent with the previously assumed coupling between photon momentum and electron’s chiral spin via the orbital momentum. Instead it reflects the surface point group. The only antisymmetric patterns appear in the energy range in which surface and bulk states hybridize. In general, a threefold-symmetric dichroic signal does not support unidirectional photocurrents. Nevertheless, the residual asymmetry of up to 3.5% in our photoemission spectra is compatible with previously observed helicity-dependent photocurrents.en
dc.subject.translatedARPES, topological insulators, KKRen
dc.identifier.doi10.1103/PhysRevB.98.155406
dc.type.statusPeer-revieweden
dc.identifier.document-number446820900006
dc.identifier.obd43923819
dc.project.IDinfo:eu-repo/grantAgreetment/EC/Výpočetní a experimentální design pokročilých materiálů s novými funkcionalitami /CZ.02.1.01/0.0/0.0/15_003/0000358cs
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