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Article: X-ray diffraction analysis on gallium-indium interdiffusion in quantum dot superlattices

TitleX-ray diffraction analysis on gallium-indium interdiffusion in quantum dot superlattices
Authors
Issue Date2001
PublisherZhongguo Wuli Xuehui & Institute of Physics Publishing Ltd. The Journal's web site is located at http://www.iop.org/EJ/journal/CPL
Citation
Chinese Physics Letters, 2001, v. 18 n. 6, p. 810-812 How to Cite?
AbstractThermal-induced interdiffusion in InAs/GaAs quantum dot superlattices is studied by high-resolution x-ray diffraction rocking curve and photoluminescence techniques. With increasing annealing temperatures, up to 300 meV a blueshift of the emission peak position and down to 16.6 meV a narrowing of the line width are found in the photoluminescence spectra, and respective intensity of the higher-order satellite peaks to lower-order ones in the x-ray rocking curves decreases. Dynamical theory is employed to simulate the measured x-ray diffraction data. Excellent agreement between the experimental curves and the simulations is achieved when the composition, thickness and stress variations caused by interdiffusion are taken into account. It is found that the significant In-Ga intermixing occurs even in the as-grown InAs/GaAs quantum dots. The estimated diffusion coefficient is 1.8 × 10-17 cm2·s-1 at 650°C, 3.2 × 10-17 cm2·s-1 at 750°C, and 1.2 × 10-14 cm2·s-1 at 850°C.
Persistent Identifierhttp://hdl.handle.net/10722/80626
ISSN
2015 Impact Factor: 0.875
2015 SCImago Journal Rankings: 0.278
References

 

DC FieldValueLanguage
dc.contributor.authorWang, Hen_HK
dc.contributor.authorXu, SJen_HK
dc.contributor.authorLi, Qen_HK
dc.contributor.authorFeng, SLen_HK
dc.date.accessioned2010-09-06T08:08:31Z-
dc.date.available2010-09-06T08:08:31Z-
dc.date.issued2001en_HK
dc.identifier.citationChinese Physics Letters, 2001, v. 18 n. 6, p. 810-812en_HK
dc.identifier.issn0256-307Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/80626-
dc.description.abstractThermal-induced interdiffusion in InAs/GaAs quantum dot superlattices is studied by high-resolution x-ray diffraction rocking curve and photoluminescence techniques. With increasing annealing temperatures, up to 300 meV a blueshift of the emission peak position and down to 16.6 meV a narrowing of the line width are found in the photoluminescence spectra, and respective intensity of the higher-order satellite peaks to lower-order ones in the x-ray rocking curves decreases. Dynamical theory is employed to simulate the measured x-ray diffraction data. Excellent agreement between the experimental curves and the simulations is achieved when the composition, thickness and stress variations caused by interdiffusion are taken into account. It is found that the significant In-Ga intermixing occurs even in the as-grown InAs/GaAs quantum dots. The estimated diffusion coefficient is 1.8 × 10-17 cm2·s-1 at 650°C, 3.2 × 10-17 cm2·s-1 at 750°C, and 1.2 × 10-14 cm2·s-1 at 850°C.en_HK
dc.languageengen_HK
dc.publisherZhongguo Wuli Xuehui & Institute of Physics Publishing Ltd. The Journal's web site is located at http://www.iop.org/EJ/journal/CPLen_HK
dc.relation.ispartofChinese Physics Lettersen_HK
dc.titleX-ray diffraction analysis on gallium-indium interdiffusion in quantum dot superlatticesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0256-307X&volume=18&spage=810&epage=812&date=2001&atitle=X-Ray+Diffraction+Analysis+on+Gallium-Indium+Interdiffusion+in+Quantum+Dot+Superlatticesen_HK
dc.identifier.emailXu, SJ: sjxu@hku.hken_HK
dc.identifier.authorityXu, SJ=rp00821en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/0256-307X/18/6/333en_HK
dc.identifier.scopuseid_2-s2.0-0035595632en_HK
dc.identifier.hkuros65108en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035595632&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume18en_HK
dc.identifier.issue6en_HK
dc.identifier.spage810en_HK
dc.identifier.epage812en_HK
dc.publisher.placeChinaen_HK
dc.identifier.scopusauthoridWang, H=8599896600en_HK
dc.identifier.scopusauthoridXu, SJ=7404439005en_HK
dc.identifier.scopusauthoridLi, Q=7405861869en_HK
dc.identifier.scopusauthoridFeng, SL=7402531622en_HK

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