Critical misfit for dislocation stability in self‐assembled islands | Zendy

Denker U. | Zendy; Jesson D. E. | Zendy

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Critical misfit for dislocation stability in self‐assembled islands

Author(s) -

Denker U.,

Jesson D. E.

Publication year - 2005

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.200440080

Subject(s) - dislocation , nanostructure , position (finance) , condensed matter physics , materials science , stability (learning theory) , instability , motion (physics) , surface energy , surface (topology) , nanotechnology , crystallography , chemical physics , physics , chemistry , classical mechanics , geometry , mechanics , mathematics , composite material , computer science , machine learning , finance , economics

The energy of a dislocation within a coherently strained nanostructure is calculated as a function of misfit and position. If the misfit is decreased below a critical value, no energetically stable position for the dislocations exists inside the island. This instability is understood in terms of a simple two‐dimensional model and we propose that this can lead to motion of the nanostructure across the surface by a novel crawl mechanism. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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