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    
Saha, S. K., Manna, S., Przybylski, M., Stepanyuk, V. S., Kirschner, J.

Sharply distinct d-band quantum-well states in palladium thin films
Physical Review B 90, (8),pp 081404/1-5 (2014)
We probe d-band quantum-well (QW) states in Pd nanofilms grown on Cu(001) using first- principles density functional theory (DFT) calculations combined with scanning tunneling spectroscopy (STS) experiments. This study reveals that QW states occur in the Pd overlayer films over a strikingly large film thickness and in a large binding energy range. The magnetic quantum number resolved orbital characters of these states are identified unambiguously by our DFT calculations. Calculations also demonstrate oscillatory multilayer relaxation and d-derived quantum size oscillation of the electronic density of states at the Fermi energy. The pseudomorphic growth, well-defined interface, and STS with single-layer thickness resolution allow us to probe individual QW states arising from the electron confinement along the growth axis of Pd films and to extract an accurate dispersion of the (∆5-type) d electronic band, as these states are laterally highly localized and give rise to distinct and sharp peaks in the tunneling spectra.

TH-2014-28