Metastable and equilibrium structures on Pt3Sn(001) studied by STM, RHEED, LEED, and AES

Autor(en): Hoheisel, M
Kuntze, J
Speller, S
Postnikov, A
Heiland, W
Spolveri, I
Bardi, U
Stichwörter: 001 SURFACE; ATOMIC-STRUCTURE; CU3AU(100); ENERGY-ELECTRON-DIFFRACTION; EPITAXY; GROWTH; Materials Science; Materials Science, Multidisciplinary; ORDERED ALLOY PT3SN; ORIENTED SINGLE-CRYSTALS; Physics; Physics, Applied; Physics, Condensed Matter; SEGREGATION; SURFACE-STRUCTURE
Erscheinungsdatum: 1999
Herausgeber: AMER PHYSICAL SOC
Journal: PHYSICAL REVIEW B
Volumen: 60
Ausgabe: 3
Startseite: 2033
Seitenende: 2039
Zusammenfassung: 
After sputtering and moderate annealing (600 K) the Pt3Sn(001) surface shows a c(2X2)-LEED pattern with streaky facet spots. The scanning tunneling microscopy (STM) images show pyramidal features that mainly consist of (102) facets, in addition to flat parts between and on top of the pyramids. On the hat parts the dominating feature are triple atomic rows, which probably consist of Pt. According to Auger electron spectroscopy the Sn surface concentration is seduced due to preferential sputtering. Annealing at 1000 K restores the Sn surface concentration and leads to an improved c(2X2)-LEED pattern with no facet spots. With the STM the disappearance of the pyramids and the formation of large flat terraces with added single atomic rows along the [100] and [010] surface directions is observed. All steps found are double steps, indicating a strict termination with the mixed Pt/Sn layer. Chemical contrast between Pt and Sn atoms is observed. [S0163-1829(99)09627-7].
ISSN: 10980121
DOI: 10.1103/PhysRevB.60.2033

Show full item record

Page view(s)

2
Last Week
0
Last month
1
checked on Feb 22, 2024

Google ScholarTM

Check

Altmetric