6533b82efe1ef96bd1294523
RESEARCH PRODUCT
Observation of quantized subband states and evidence for surface electron accumulation in CdO from angle-resolved photoemission spectroscopy
A. V. FederovLouis F. J. PiperFriedhelm BechstedtFrank FuchsTim D. VealTim LearmonthAndre SchleifePhil D. C. KingVicente Muñoz-sanjoséPer Anders GlansKevin E. SmithL. ColakerolChristopher F McconvilleJesús Zúñiga-pérezsubject
Materials scienceCondensed matter physicsPhotoemission spectroscopyInverse photoemission spectroscopyAngle-resolved photoemission spectroscopyElectronElectronic structureThin filmCondensed Matter PhysicsElectronic band structureLayer (electronics)Electronic Optical and Magnetic Materialsdescription
The electronic structure of well-ordered single-crystal thin films of CdO100 has been studied using angleresolved photoemission spectroscopy. Quantized electron subbands are observed above the valence-band maximum. The existence of these states provides evidence of an intrinsic electron accumulation space-charge layer near the CdO surface, an interpretation supported by coupled Poisson-Schrodinger calculations. The origin of the accumulation layer result is discussed in terms of the bulk band structure of CdO calculated using quasiparticle-corrected density-functional theory, which reveals that the conduction-band minimum at the Brillouin-zone center lies below the charge neutrality level.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-10-29 | Physical Review B |