1992    
1993    
1994    
1995    
1996    
1997    
1998    
1999    
2000    
2001    
2002    
2003    
2004    
2005    
2006    
2007    
2008    
2009    
2010    
2011    
2012    
2013    
2014    
2015    
2016    
Niebergall, L., Rodary, G., Ding, H. F., Sander, D., Stepanyuk, V. S., Bruno, P., Kirschner, J.

Electron confinement in hexagonal vacancy islands: Theory and experiment
Physical Review B 74, (19),pp 195436/1-6 (2006)
Electron confinement in hexagonal vacancy islands on Cu(111) is studied by state of the art ab initio calculations and experimentally by low-temperature scanning tunneling spectroscopy measurements (STS). Both theory and experiment reveal standing wave patterns of the local density of states (LDOS), which are ascribed to the scattering of surface-state electrons at the boundary of the vacancy island. The spatial modulation of the LDOS, its size, and energy dependence as measured by STS are well reproduced by our calculations. This agreement between theory and experiment corroborates the application of our theoretical approach to other confined systems, including spin-polarized effects. Our studies predict that quantum states of vacancy islands with magnetic adatoms can be used to tailor the spin-polarization of surface-state electrons on metal surfaces.

TH-2006-40