Two-dimensional localization of electrons at interfaces
- 4 April 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 72 (14) , 2243-2246
- https://doi.org/10.1103/physrevlett.72.2243
Abstract
Evidence for electron localization in 2D at metal-dielectric interfaces is reported. A nondispersive peak, derived from the image-potential state and observed in angle-resolved two-photon photoemission, is assigned to localized excess electrons. The image electron on alkane monolayers is a free electron. Bilayers of chain or ring alkanes show both localized and delocalized states; electrons are localized on trilayer n-pentane. Bilayers and trilayers of neopentane show no localization. Our results link the geometry of adlayer molecules with localization of excess electrons at interfaces.Keywords
This publication has 21 references indexed in Scilit:
- Weak localization in thin films: a time-of-flight experiment with conduction electronsPublished by Elsevier ,2002
- Electrons at metal-insulator interfaces: I. The effect of Xe monolayers on the image potential states of Ag(111)Surface Science, 1993
- Image states and local work function for Ag/Pd(111)Physical Review Letters, 1993
- Two-photon photoemission as a probe of electron interactions with atomically thin dielectric films on metal surfacesPhysical Review Letters, 1992
- Spectroscopy of image-potential states by two-photon photoemissionApplied Physics A, 1989
- Anderson Localization of Electrons in DenseGasPhysical Review Letters, 1988
- Two-photon photoemission from adsorbate-induced states: Atomic oxygen on Cu(111)Physical Review Letters, 1987
- Electron localisation in nonstoichiometric films of aluminium nitride produced by reactive sputteringJournal of Physics C: Solid State Physics, 1987
- Identification of Image-Potential Surface States on MetalsPhysical Review Letters, 1984
- Electronic properties of two-dimensional systemsReviews of Modern Physics, 1982