Complicated exchange-mediated diffusion mechanisms in and on a Cu(100) substrate at high temperatures

Autor:	Zeng-Ju Tian, J.E. Black
Rok vydání:	1993
Předmět:	inorganic chemicals Copper substrate Materials science Strain (chemistry) Diffusion General Physics and Astronomy Substrate (chemistry) chemistry.chemical_element Copper Molecular dynamics Crystallography Transition metal chemistry Atom Physical chemistry
Zdroj:	Physical review letters. 71(15)
ISSN:	1079-7114
Popis:	We present results obtained from a molecular dynamics study of the behavior of isolated copper atoms placed on a copper substrate. The atomic interactions are modeled by the embedded atom method. At 900 K we find that diffusion frequently proceeds by a two-step exchange-mediated process. In the first step of the process an isolated surface atom enters the Cu(100) substrate creating a strain along a close-packed row. In the second step the strain is relieved by an atom in the strained row returning to the surface of the Cu(100) substrate. The atom which returns to the surface may be several atoms removed from the atom which entered the substrate.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af9d9a670d0486d7d8abec5a56aa9069 https://pubmed.ncbi.nlm.nih.gov/10054682 Zobrazit plný text záznamu