Abbreviated Journal Title
Appl. Phys. Lett.
SCANNING TUNNELING MICROSCOPE; THIN-FILMS; TEMPERATURE-DEPENDENCE; ELASTIC-CONSTANTS; GROWTH; DYNAMICS; Physics, Applied
The local in-plane strain of Ag(111) islands on the Nb(110) surface has been derived from the lateral variation of the electronic density of states measured by scanning tunneling spectroscopy. The onset energy E-ss of the Shockley-type surface-state band is shifted to higher energies compared to the bulk due to thermal strain arising from the difference in thermal expansion between Nb and Ag and cooling by 565K. A quantitative dependence of E-ss from the strain is obtained by density-functional theory calculations. This allows a mapping of the local strain of individual Ag islands on the nanometer scale.
Applied Physics Letters
Tomanic, T.; Sürgers, C.; Heid, R.; Ortigoza, M. Alcántara; Bohnen, K. -P.; Stöffler, D.; and Löhneysen, H. V., "Local-strain mapping on Ag(111) islands on Nb(110)" (2012). Faculty Bibliography 2010s. 3391.