Photoemission spectroscopy

About: Photoemission spectroscopy is a research topic. Over the lifetime, 10821 publications have been published within this topic receiving 250888 citations. The topic is also known as: photoelectron spectroscopy & PES.

Possible Quasi-One-Dimensional Fermi Surface in La2-xSrxCuO4.

Abstract: To reconcile the two experimental findings on La 2- x Sr x CuO 4 , namely, Fermi surface (FS) observed by angle-resolved photoemission spectroscopy and sharp incommensurate magnetic peaks by neutro...

Electronic properties of interfaces between model organic semiconductors and metals

Abstract: We present a summary of recent studies of the interface properties of interfaces that are formed between well-established molecular organic semiconductors and various metals. The energy level alignment, the formation of interface dipoles, a possible band bending and interactions at the interfaces have been investigated using photoemission spectroscopy, while polarization-dependent X-ray absorption spectroscopy provided information on the molecular orientation at the interfaces. The observed interface characteristics reach from physisorption to a reaction depending upon both the substrate and the organic molecule under investigation. Different contributions to the often observed interface dipoles are discussed. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

Resonant photoemission of anatase TiO2 (101) and (001) single crystals

Abstract: The resonant behavior of anatase ${\mathrm{TiO}}_{2}$ (101) and (001) surfaces has been investigated using synchrotron photoemission spectroscopy. The data are compared with earlier photoemission work from rutile ${\mathrm{TiO}}_{2}(110)$ and calculations for bulk anatase in order to elucidate the degree of Ti-O hybridization in the valence band. The results for the (101) surface show good general agreement with bulk band-structure calculations. Deviations from the bulk band structure in the case of the (001) surface are attributed to the reconstruction of this surface. A small peak is observed at around 1 eV binding energy (relative to the Fermi energy) for both surfaces following the creation of surface defects (O vacancies), which is thought to arise from surface ${\mathrm{Ti}}^{3+}.$ The attenuation of this peak by gentle heating in ${\mathrm{O}}_{2}$ is attributed to healing of the surface O vacancies.

Origin of the Bipolar Doping Behavior of SnO from X-ray Spectroscopy and Density Functional Theory

Abstract: The origin of the almost unique combination of optical transparency and the ability to bipolar dope tin monoxide is explained using a combination of soft and hard X-ray photoemission spectroscopy, ...

Electronic properties of adsorbed layers of nitrogen, oxygen, and sulfur on copper (100)

Abstract: Adsorbed layers of nitrogen and oxygen in the $c(2\ifmmode\times\else\texttimes\fi{}2)$ structure and sulfur in the (2 \ifmmode\times\else\texttimes\fi{} 2) structure on copper (100) have been studied. Ultraviolet photoemission spectroscopy (UPS) shows that each of these layers induces a resonance above the "$d$ band" of copper at about 1.3-eV binding energy with respect to the Fermi level and below the "$d$ band" at about 6-eV binding energy. X-ray photoemission spectroscopy has been used to determine that the $1s$ electronic binding energies of adsorbed atoms of $c(2\ifmmode\times\else\texttimes\fi{}2)$ nitrogen and oxygen are 396.3 and 529.8 eV, respectively, and that the $2p$ electronic binding energy of adsorbed 2 \ifmmode\times\else\texttimes\fi{} 2 sulfur is 161.2 eV. The highest-energy Auger peaks excited by each of these core holes may be interpreted as arising from Auger transitions involving the surface electronic states measured in these UPS experiments. Good agreement with most features of the experimental Auger spectra has been obtained using measured and calculated data for the surface electronic binding energies under the assumption that Auger final-state effects are small. Therefore the evidence points to the formation of a copper-adsorbate surface complex in which these UPS-observed resonances have a high local density of states at the adsorbate atom cores and in which the final-state hole momenta are only loosely coupled.