This title appears in the Scientific Report :
2005
Please use the identifier:
http://hdl.handle.net/2128/1104 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.95.125502 in citations.
Agglomeration of As antisites in As-rich low-temperature GaAs: Nucleation without a critical nucleus size
Agglomeration of As antisites in As-rich low-temperature GaAs: Nucleation without a critical nucleus size
To investigate the early stages of nucleation and growth of As precipitates in GaAs grown at low substrate temperature, we make use of a self-consistent-charge density-functional based tight-binding method. Since a pair of As antisites already shows a significant binding energy which increases when...
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Personal Name(s): | Staab, T. E. M. |
---|---|
Nieminen, R. M. / Luysberg, M. / Frauenheim, Th. | |
Contributing Institute: |
Mikrostrukturforschung; IFF-IMF |
Published in: | Physical review letters, 95 (2005) S. 125502 |
Imprint: |
College Park, Md.
APS
2005
|
Physical Description: |
125502 |
DOI: |
10.1103/PhysRevLett.95.125502 |
Document Type: |
Journal Article |
Research Program: |
Materialien, Prozesse und Bauelemente für die Mikro- und Nanoelektronik |
Series Title: |
Physical Review Letters
95 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.95.125502 in citations.
To investigate the early stages of nucleation and growth of As precipitates in GaAs grown at low substrate temperature, we make use of a self-consistent-charge density-functional based tight-binding method. Since a pair of As antisites already shows a significant binding energy which increases when more As antisites are attached, there is no critical nucleus size. Provided that all excess As has precipitated, the clusters may grow in size since the binding energies increase with increasing agglomeration size. These findings close the gap between experimental investigation of point defects and the detection of nanometer-size precipitates in transmission electron microscopy. |