Abstract
Energies of the formation of monovacancies, as well as the binding energies and work functions of quasi-free and localized positrons and positroniums have been calculated in terms of the gradient version of the density-functional method using the stable-jellium model. The calculations show that for the metals possessing negative positron work function, the presence of vacancies in the subsurface region can lead to the change in the sign of the work function. The same effect of the change in the sign of the work function of a quasi-free positron can be caused by the presence of a dielectric coating on the metal surface. Comparison with the experiment is performed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
