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dc.contributor.authorKing, P. D. C.
dc.contributor.authorHe, R. H.
dc.contributor.authorEknapakul, T.
dc.contributor.authorBuaphet, P.
dc.contributor.authorMo, S-K
dc.contributor.authorKaneko, Y.
dc.contributor.authorHarashima, S.
dc.contributor.authorHikita, Y.
dc.contributor.authorBahramy, M. S.
dc.contributor.authorBell, C.
dc.contributor.authorHussain, Z.
dc.contributor.authorTokura, Y.
dc.contributor.authorShen, Z-X
dc.contributor.authorHwang, H. Y.
dc.contributor.authorBaumberger, F.
dc.contributor.authorMeevasana, W.
dc.identifier.citationKing , P D C , He , R H , Eknapakul , T , Buaphet , P , Mo , S-K , Kaneko , Y , Harashima , S , Hikita , Y , Bahramy , M S , Bell , C , Hussain , Z , Tokura , Y , Shen , Z-X , Hwang , H Y , Baumberger , F & Meevasana , W 2012 , ' Subband structure of a two-dimensional electron gas formed at the polar surface of the strong spin-orbit perovskite KTaO 3 ' , Physical Review Letters , vol. 108 , no. 11 , 117602 .
dc.identifier.otherPURE: 22876432
dc.identifier.otherPURE UUID: 90bccd9c-f742-4fdc-9d98-55f01406b1d4
dc.identifier.otherWOS: 000301478400015
dc.identifier.otherScopus: 84858223713
dc.description.abstractWe demonstrate the formation of a two-dimensional electron gas (2DEG) at the (100) surface of the 5d transition-metal oxide KTaO3. From angle-resolved photoemission, we find that quantum confinement lifts the orbital degeneracy of the bulk band structure and leads to a 2DEG composed of ladders of subband states of both light and heavy carriers. Despite the strong spin-orbit coupling, our measurements provide a direct upper bound for the potential Rashba spin splitting of only Delta k(parallel to) similar to 0.02 angstrom(-1) at the Fermi level. The polar nature of the KTaO3(100) surface appears to help mediate the formation of the 2DEG as compared to nonpolar SrTiO3(100).
dc.relation.ispartofPhysical Review Lettersen
dc.rights© 2012 American Physical Societyen
dc.subjectQC Physicsen
dc.titleSubband structure of a two-dimensional electron gas formed at the polar surface of the strong spin-orbit perovskite KTaO3en
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews.Condensed Matter Physicsen
dc.description.statusPeer revieweden

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