Theoretical investigation of structural instabilities of Fe layers on face‐centered‐cubic Cu
作者:
Lars Nordström,
David J. Singh,
期刊:
Journal of Vacuum Science&Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena
(AIP Available online 1996)
卷期:
Volume 14,
issue 4
页码: 3160-3163
ISSN:1071-1023
年代: 1996
DOI:10.1116/1.588800
出版商: American Vacuum Society
关键词: THIN FILMS;SUBSTRATES;IRON;COPPER;CRYSTAL STRUCTURE;ELECTRONIC STRUCTURE;INSTABILITY;Fe;Cu
数据来源: AIP
摘要:
Calculations of structural stabilities for thin iron layers as grown on Cu(001) are reported. It is found that a free‐standing fcc(001) monolayer is unstable with respect to 3×1 and 4×1 distortions. The former instability is directly related to the Pitsch transformation from fcc(001) to bcc(110), and calculations along the path find bcc(110) as the stable structure. Inclusion of the Cu substrate in the calculation tends to stabilize fcc(001). The calculated instabilities are of similar form to the superstructures observed for Fe grown on Cu(001). The relation to the experimental situation is discussed.
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