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Subband structure of a two-dimensional electron gas formed at the polar surface of the strong spin-orbit perovskite KTaO3
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dc.contributor.author | King, P. D. C. | |
dc.contributor.author | He, R. H. | |
dc.contributor.author | Eknapakul, T. | |
dc.contributor.author | Buaphet, P. | |
dc.contributor.author | Mo, S-K | |
dc.contributor.author | Kaneko, Y. | |
dc.contributor.author | Harashima, S. | |
dc.contributor.author | Hikita, Y. | |
dc.contributor.author | Bahramy, M. S. | |
dc.contributor.author | Bell, C. | |
dc.contributor.author | Hussain, Z. | |
dc.contributor.author | Tokura, Y. | |
dc.contributor.author | Shen, Z-X | |
dc.contributor.author | Hwang, H. Y. | |
dc.contributor.author | Baumberger, F. | |
dc.contributor.author | Meevasana, W. | |
dc.date.accessioned | 2014-06-06T09:01:02Z | |
dc.date.available | 2014-06-06T09:01:02Z | |
dc.date.issued | 2012-03-14 | |
dc.identifier.citation | King , 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 . https://doi.org/10.1103/PhysRevLett.108.117602 | en |
dc.identifier.issn | 0031-9007 | |
dc.identifier.other | PURE: 22876432 | |
dc.identifier.other | PURE UUID: 90bccd9c-f742-4fdc-9d98-55f01406b1d4 | |
dc.identifier.other | WOS: 000301478400015 | |
dc.identifier.other | Scopus: 84858223713 | |
dc.identifier.uri | https://hdl.handle.net/10023/4859 | |
dc.description.abstract | We 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.format.extent | 5 | |
dc.language.iso | eng | |
dc.relation.ispartof | Physical Review Letters | en |
dc.rights | © 2012 American Physical Society | en |
dc.subject | QC Physics | en |
dc.subject.lcc | QC | en |
dc.title | Subband structure of a two-dimensional electron gas formed at the polar surface of the strong spin-orbit perovskite KTaO3 | en |
dc.type | Journal article | en |
dc.contributor.sponsor | EPSRC | en |
dc.contributor.sponsor | EPSRC | en |
dc.description.version | Publisher PDF | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. Condensed Matter Physics | en |
dc.identifier.doi | https://doi.org/10.1103/PhysRevLett.108.117602 | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | EP/J014745/1 | en |
dc.identifier.grantnumber | EP/I031014/1 | en |
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