Citation
Kj. Engel et al., Thermovoltage mapping of standing electron waves on Au(111) surfaces at low temperatures - art. no. 165402, PHYS REV B, 6316(16), 2001, pp. 5402
Citations number
36
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829
→ ACNP
Volume
6316
Issue
16
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010415)6316:16<5402:TMOSEW>2.0.ZU;2-A
Abstract
Standing-wave patterns of Au(111) surface electrons in the vicinity of mona
tornic steps were studied by mapping the thermovoltage across the tunneling
gap of a low-temperature scanning tunneling microscope (STM). In contrast
to other STM spectroscopic methods, the amplitude of the standing-wave osci
llations builds up with distance from the step, up to a maximum. When the t
emperature T is decreased, the position of this maximum shifts outwards pro
portional to 1/T. This behavior is explained with an analytical expression
and also with numerical calculations of the thermovoltage in the framework
of the model of Tersoff and Hamann.