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Intrinsic energy band alignment of functional oxides
Physica status solidi. PSS-RRL. Rapid research letters, 2014-06, Vol.8 (6), p.571-576
Li, Shunyi
Chen, Feng
Schafranek, Robert
Bayer, Thorsten J. M.
Rachut, Karsten
Fuchs, Anne
Siol, Sebastian
Weidner, Mirko
Hohmann, Mareike
Pfeifer, Verena
Morasch, Jan
Ghinea, Cosmina
Arveux, Emmanuel
Günzler, Richard
Gassmann, Jürgen
Körber, Christoph
Gassenbauer, Yvonne
Säuberlich, Frank
Rao, Gutlapalli Venkata
Payan, Sandrine
Maglione, Mario
Chirila, Cristina
Pintilie, Lucian
Jia, Lichao
Ellmer, Klaus
Naderer, Michael
Reichmann, Klaus
Böttger, Ulrich
Schmelzer, Sebastian
Frunza, Raluca C.
Uršič, Hana
Malič, Barbara
Wu, Wen-Bin
Erhart, Paul
Klein, Andreas
2014
Details
Autor(en) / Beteiligte
Li, Shunyi
Chen, Feng
Schafranek, Robert
Bayer, Thorsten J. M.
Rachut, Karsten
Fuchs, Anne
Siol, Sebastian
Weidner, Mirko
Hohmann, Mareike
Pfeifer, Verena
Morasch, Jan
Ghinea, Cosmina
Arveux, Emmanuel
Günzler, Richard
Gassmann, Jürgen
Körber, Christoph
Gassenbauer, Yvonne
Säuberlich, Frank
Rao, Gutlapalli Venkata
Payan, Sandrine
Maglione, Mario
Chirila, Cristina
Pintilie, Lucian
Jia, Lichao
Ellmer, Klaus
Naderer, Michael
Reichmann, Klaus
Böttger, Ulrich
Schmelzer, Sebastian
Frunza, Raluca C.
Uršič, Hana
Malič, Barbara
Wu, Wen-Bin
Erhart, Paul
Klein, Andreas
Titel
Intrinsic energy band alignment of functional oxides
Ist Teil von
Physica status solidi. PSS-RRL. Rapid research letters, 2014-06, Vol.8 (6), p.571-576
Ort / Verlag
Berlin: WILEY-VCH Verlag
Erscheinungsjahr
2014
Link zum Volltext
Quelle
Wiley Online Library
Beschreibungen/Notizen
The energy band alignment at interfaces between different materials is a key factor, which determines the function of electronic devices. While the energy band alignment of conventional semiconductors is quite well understood, systematic experimental studies on oxides are still missing. This work presents an extensive study on the intrinsic energy band alignment of a wide range of functional oxides using photoelectron spectroscopy with in‐situ sample preparation. The studied materials have particular technological importance in diverse fields as solar cells, piezotronics, multiferroics, photo‐electrochemistry and oxide electronics. Particular efforts have been made to verify the validity of transitivity, in order to confirm the intrinsic nature of the obtained band alignment and to understand the underlying principles. Valence band offsets up to 1.6 eV are observed. The large variation of valence band maximum energy can be explained by the different orbital contributions to the density of states in the valence band. The framework provided by this work enables the general understanding and prediction of energy band alignment at oxide interfaces, and furthermore the tailoring of energy level matching for charge transfer in functional oxides. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) Part of Focus Issue on “Functional Oxides” (Eds.: T. Frauenheim, J. M. Knaup, P. Broqvist, S. Ramanathan) In this Letter, the intrinsic energy band alignment of a wide range of functional oxides has been studied systematically. The transitive nature and its correlation with orbital contributions provide a fundamental understanding as well as a rational guideline for predicting intrinsic band alignment between oxides.
Sprache
Englisch
Identifikatoren
ISSN: 1862-6254, 1862-6270
eISSN: 1862-6270
DOI: 10.1002/pssr.201409034
Titel-ID: cdi_swepub_primary_oai_research_chalmers_se_d0eef055_2ac3_4707_9fa6_85711286f77a
Format
–
Schlagworte
electronic structure
,
Electrons
,
energy band alignment
,
functional oxides
,
Interfaces
,
Metal oxides
,
photoelectron spectroscopy
,
Spectrum analysis
,
transitivity
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