Adsorption of Na on single crystals of NiO(1 0 0) at room temperature has been investigated via angle-resolved photoemission spectroscopy and measurements of work-function changes. The drastic changes in the valence band spectra upon Na deposition are assigned to a chemical reaction between Na and O where metallic Ni is left as by-product. At short deposition times, Na mainly acts as an inert electron donor, and at these coverages no dispersion is observed in the angle-resolved photoemission spectra which indicates that the electronic states are localized. The measurements were performed both for a polished and an in-situ cleaved NiO crystal.
Electronic Structure of NiO(100) with Adsorbed Na / T., Rogelet; S., Soderholm; M., Qvarford; Saini, Naurang Lal; U. O., Karlsson; I. LINDAU, S. A. FLODSTROM. - In: SOLID STATE COMMUNICATIONS. - ISSN 0038-1098. - STAMPA. - 85:(1993), pp. 657-660. [10.1016/0038-1098(93)90328-K]
Electronic Structure of NiO(100) with Adsorbed Na
SAINI, Naurang Lal;
1993
Abstract
Adsorption of Na on single crystals of NiO(1 0 0) at room temperature has been investigated via angle-resolved photoemission spectroscopy and measurements of work-function changes. The drastic changes in the valence band spectra upon Na deposition are assigned to a chemical reaction between Na and O where metallic Ni is left as by-product. At short deposition times, Na mainly acts as an inert electron donor, and at these coverages no dispersion is observed in the angle-resolved photoemission spectra which indicates that the electronic states are localized. The measurements were performed both for a polished and an in-situ cleaved NiO crystal.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
