Local aspects of hydrogen-induced metallization of the ZnO(10-10) surface

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Deinert, J. C.
dc.contributor.author Hofmann, O. T.
dc.contributor.author Meyer, M.
dc.contributor.author Rinke, P.
dc.contributor.author Stähler, J.
dc.date.accessioned 2016-09-23T08:23:41Z
dc.date.issued 2015-06-12
dc.identifier.citation Deinert , J-C , Hofmann , O T , Meyer , M , Rinke , P & Stähler , J 2015 , ' Local aspects of hydrogen-induced metallization of the ZnO(10-10) surface ' PHYSICAL REVIEW B , vol 91 , no. 23 , 235313 , pp. 1-9 . DOI: 10.1103/PhysRevB.91.235313 en
dc.identifier.issn 1098-0121
dc.identifier.issn 1550-235X
dc.identifier.other PURE UUID: bce85ba5-9eed-4449-9f14-1e42c4d7d897
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/local-aspects-of-hydrogeninduced-metallization-of-the-zno1010-surface(bce85ba5-9eed-4449-9f14-1e42c4d7d897).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=84935121044&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/9111904/PhysRevB.91.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/22352
dc.description.abstract This study combines surface-sensitive photoemission experiments with density functional theory to give a microscopic description of H-adsorption-induced modifications of the ZnO(101¯0) surface electronic structure. We find a complex adsorption behavior caused by a strong coverage dependence of the H adsorption energies: Initially, O-H bond formation is energetically favorable and H acting as an electron donor leads to the formation of a charge accumulation layer and to surface metallization. The increase of the number of O-H bonds leads to a reversal in adsorption energies such that Zn-H bonds become favored at sites close to existing O-H bonds, which results in a gradual extenuation of the metallization. The corresponding surface potential changes are localized within a few nanometers both laterally and normal to the surface. This localized character is experimentally corroborated by using subsurface bound excitons at the ZnO(101¯0) surface as a local probe. The pronounced and comparably localized effect of small amounts of hydrogen at this surface strongly suggests metallic character of ZnO surfaces under technologically relevant conditions and may, thus, be of high importance for energy level alignment at ZnO-based junctions in general. en
dc.format.extent 1-9
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries PHYSICAL REVIEW B en
dc.relation.ispartofseries Volume 91, issue 23 en
dc.rights openAccess en
dc.subject.other Condensed Matter Physics en
dc.subject.other Electronic, Optical and Magnetic Materials en
dc.subject.other 114 Physical sciences en
dc.subject.other 221 Nanotechnology en
dc.subject.other 214 Mechanical engineering en
dc.subject.other 218 Environmental engineering en
dc.title Local aspects of hydrogen-induced metallization of the ZnO(10-10) surface en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Fritz-Haber-Institut der Max-Planck-Gesellschaft
dc.contributor.department Graz University of Technology
dc.contributor.department Department of Applied Physics
dc.subject.keyword density functional theory
dc.subject.keyword hydrogen
dc.subject.keyword metallization
dc.subject.keyword photoemission
dc.subject.keyword surface science
dc.subject.keyword ZnO
dc.subject.keyword Condensed Matter Physics
dc.subject.keyword Electronic, Optical and Magnetic Materials
dc.subject.keyword 114 Physical sciences
dc.subject.keyword 221 Nanotechnology
dc.subject.keyword 214 Mechanical engineering
dc.subject.keyword 218 Environmental engineering
dc.identifier.urn URN:NBN:fi:aalto-201609234356
dc.identifier.doi 10.1103/PhysRevB.91.235313
dc.type.version publishedVersion


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