How are the lower lying atoms imaged brighter than the higher lying ones in the STM experiments?

Authors
Jung, DW
Citation
Dw. Jung, How are the lower lying atoms imaged brighter than the higher lying ones in the STM experiments?, B KOR CHEM, 22(5), 2001, pp. 499-502
Citations number
11
Categorie Soggetti
Chemistry
Journal title
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
ISSN journal
02532964 → ACNP
Volume
22
Issue
5
Year of publication
2001
Pages
499 - 502
Database
ISI
SICI code
0253-2964(20010520)22:5<499:HATLLA>2.0.ZU;2-2
Abstract
Unexpectedly, the brightest row was known to represents the lowest lying Te atoms in the STM image of NbTe2. Projected density of states and crystal o rbital overlap population show that the 5pz orbital of the lowest lying Te( 2) atom does not interact with the 4d orbital of Nh strongly so that the 5p , band remains in the vicinity of the Fermi energy. Consequently the lowest lying Te(2) atoms contribute higher electron density near the Fermi energy which in turn exhibits brightest image in the STM experiments.