Show simple item record

Files in this item


Item metadata

dc.contributor.authorUlstrup, Søren
dc.contributor.authorČabo, Antonija Grubišić
dc.contributor.authorRiley, Jonathon M.
dc.contributor.authorDendzik, Maciej
dc.contributor.authorSanders, Charlotte E.
dc.contributor.authorBianchi, Marco
dc.contributor.authorCacho, Cephise
dc.contributor.authorMatselyukh, Dan
dc.contributor.authorChapman, Richard T.
dc.contributor.authorSpringate, Emma
dc.contributor.authorKing, Phil D. C.
dc.contributor.authorMiwa, Jill A.
dc.contributor.authorHofmann, Philip
dc.identifier.citationUlstrup , S , Čabo , A G , Riley , J M , Dendzik , M , Sanders , C E , Bianchi , M , Cacho , C , Matselyukh , D , Chapman , R T , Springate , E , King , P D C , Miwa , J A & Hofmann , P 2017 , ' Spin and valley control of free carriers in single-layer WS 2 ' , Physical Review. B, Condensed matter and materials physics , vol. 95 , no. 4 , 041405(R) .
dc.identifier.otherPURE: 248685051
dc.identifier.otherPURE UUID: 23de5d85-4e1c-4ffc-9bfb-db1defe368a0
dc.identifier.otherScopus: 85010765045
dc.identifier.otherWOS: 000400771400002
dc.descriptionData are available from
dc.description.abstractThe semiconducting single-layer transition metal dichalcogenides have been identified as ideal materials for accessing and manipulating spin- and valley-quantum numbers due to a set of favorable optical selection rules in these materials. Here, we apply time- and angle-resolved photoemission spectroscopy to directly probe optically excited free carriers in the electronic band structure of a high quality single layer (SL) of WS2 grown on Ag(111). We present a momentum resolved analysis of the optically generated free hole density around the valence band maximum of SL WS2 for linearly and circularly polarized optical excitations. We observe that the excited free holes are valley polarized within the upper spin-split branch of the valence band, which implies that the photon energy and polarization of the excitation permit selective excitations of free electron-hole pairs with a given spin and within a single valley.
dc.relation.ispartofPhysical Review. B, Condensed matter and materials physicsen
dc.rights© 2017 American Physical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at /
dc.subjectQC Physicsen
dc.subjectT Technologyen
dc.titleSpin and valley control of free carriers in single-layer WS2en
dc.typeJournal articleen
dc.contributor.sponsorThe Royal Societyen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.description.statusPeer revieweden

This item appears in the following Collection(s)

Show simple item record