Transport of Deposited Atoms throughout Strain-Mediated Self-Assembly

Journal Article · Fri Jul 09 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.026101· OSTI ID:21410908

Moutanabbir, Oussama ^[1]; Miyamoto, Satoru; Itoh, Kohei M ^[1]; Haller, Eugene E ^[2]

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1. School of Fundamental Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522 (Japan)
2. Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, California 94720-1760 (United States)

Using enriched isotopes, we developed a method to elucidate the long-standing issue of Ge transport governing the strain-driven self-assembly. Here {sup 76}Ge was employed to form the 2D metastable layer on a Si(001) surface, while the 3D transition and growth were completed by additional evaporation of {sup 70}Ge. This isotope tracing combined with the analysis of the Ge-Ge LO phonon enables the tracking of the origin of Ge atoms and their flow towards the growing islands. This atomic transport was quantified based on the quasiharmonic approximation of Ge-Ge vibrations and described using a rate equation model.

• OSTI ID: 21410908
• Journal Information: Physical Review Letters, Vol. 105, Issue 2; Other Information: DOI: 10.1103/PhysRevLett.105.026101; (c) 2010 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
APPROXIMATIONS
ATOM TRANSPORT
ATOMS
CRYSTAL GROWTH
DEPOSITION
EVAPORATION
GERMANIUM 70
GERMANIUM 76
LAYERS
PHONONS
REACTION KINETICS
SILICON
STRAINS
SURFACES
CALCULATION METHODS
ELEMENTS
EVEN-EVEN NUCLEI
GERMANIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
ISOTOPES
KINETICS
NEUTRAL-PARTICLE TRANSPORT
NUCLEI
PHASE TRANSFORMATIONS
QUASI PARTICLES
RADIATION TRANSPORT
SEMIMETALS
STABLE ISOTOPES