Observation of defects associated with the Cu/W(110) interface as studied with variable-energy positrons
- 1 June 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 27 (11), 6626-6634
- https://doi.org/10.1103/physrevb.27.6626
Abstract
Positron emission from a W(110) single crystal has been studied as a function of copper coverage utilizing a variable-energy positron beam in conjunction with low-energy electron diffraction and Auger-electron spectroscopy. Evidence is presented that indicates that significant positron localization occurs at defects associated with the Cu/W(110) interface, which can be removed by high-temperature annealing. Our data also reveal new information about the islanding of copper on tungsten, providing a reliable means of identifying and quantifying the relative two-dimensional coverage of the surface by these islands.Keywords
This publication has 35 references indexed in Scilit:
- Temperature dependence of the fraction of re-emitted positrons and of the positron work function for Cu(111) + SPhysical Review B, 1982
- Evidence for shallow positron traps in a neutron-irradiated A1 single crystal as studied with variable-energy positronsPhysical Review B, 1982
- Observation of the Positronium Negative IonPhysical Review Letters, 1981
- Correlations between electron and positron workfunctions on copper surfacesSurface Science, 1980
- Slow positrons in metal single crystals. I. Positronium formation at Ag(100), Ag(111), and Cu(111) surfacesPhysical Review B, 1980
- Narrow beam emission of slow positrons from negative affinity surfacesSolid State Communications, 1980
- Observation of the Amorphous-to-Crystalline Surface Transition in Al-Using Slow PositronsPhysical Review Letters, 1980
- Observation of Surface Traps and Vacancy Trapping with Slow PositronsPhysical Review Letters, 1979
- Positronium Formation at SurfacesPhysical Review Letters, 1978
- Slow-Positron Emission from Metal SurfacesPhysical Review Letters, 1978