Intermixing and lateral composition modulation in GaAs/GaSb short period superlattices
dc.contributor.author | Dorin, C. | en_US |
dc.contributor.author | Mirecki-Millunchick, Joanna | en_US |
dc.contributor.author | Wauchope, C. | en_US |
dc.date.accessioned | 2010-05-06T20:35:39Z | |
dc.date.available | 2010-05-06T20:35:39Z | |
dc.date.issued | 2003-08-01 | en_US |
dc.identifier.citation | Dorin, C.; Mirecki Millunchick, J.; Wauchope, C. (2003). "Intermixing and lateral composition modulation in GaAs/GaSb short period superlattices." Journal of Applied Physics 94(3): 1667-1675. <http://hdl.handle.net/2027.42/69432> | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/69432 | |
dc.description.abstract | Lateral composition modulation on the group V sublattice has been investigated in GaAs/GaSb short period superlattices. The effect of As species and growth temperature on the appearance of lateral composition modulation was studied. Cross-sectional transmission electron microscopy and x-ray diffraction reciprocal space maps reveal that structures grown using As tetramers are always disordered, defective, and phase separated. Also, in these structures the As-rich regions appear to be composed of stacked GaAs quantum dots embedded in a GaSb matrix. The structures grown with As dimers show improved crystalline quality. Short period superlattices grown at T<420 °CT<420 °C have flat interfaces and are laterally homogeneous, however, there is significant anion intermixing across the interfaces. Structures deposited at 420 °C<T<445 °C420 °C<T<445 °C roughen during growth, and exhibit lateral composition modulation and anion intermixing. Growing at higher temperatures destroys both the superlattice structure and the lateral composition modulation. The As sticking coefficient was calculated and was found to range between 0.1⩽σ⩽0.170.1⩽σ⩽0.17 depending on the growth temperature and As species. © 2003 American Institute of Physics. | en_US |
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dc.format.extent | 1153862 bytes | |
dc.format.mimetype | text/plain | |
dc.format.mimetype | application/pdf | |
dc.publisher | The American Institute of Physics | en_US |
dc.rights | © The American Institute of Physics | en_US |
dc.title | Intermixing and lateral composition modulation in GaAs/GaSb short period superlattices | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Physics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 | en_US |
dc.contributor.affiliationum | Electron Microbeam Analysis Laboratory, University of Michigan, Ann Arbor, Michigan 48109-2143 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/69432/2/JAPIAU-94-3-1667-1.pdf | |
dc.identifier.doi | 10.1063/1.1591419 | en_US |
dc.identifier.source | Journal of Applied Physics | en_US |
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dc.owningcollname | Physics, Department of |
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