Zero-strain GaAs quantum dot molecules as investigated by x-ray diffuse scattering
- Martin-Luther-Universitaet Halle-Wittenberg, Fachbereich Physik, Hoher Weg 8, D-06120 Halle/Saale (Germany)
The authors report on x-ray diffuse scattering at nominally strain-free GaAs(001) quantum dot molecules (QDMs). Al{sub 0.3}Ga{sub 0.7}As deposited by molecular beam epitaxy on GaAs(001) acts as barrier layer between the GaAs(001) substrate and subsequently grown QDMs; the adjusted thickness of 50 nm preserves the in-plane lattice parameter. Pairs of lenselike quantum dots are created with preferential orientation along [110] placed on shallow hills. Grazing incidence diffraction along with kinematical scattering simulations indicate completely strain-free QDs which prove a strongly suppressed intermixing between QDMs and the underlying AlGaAs barrier layer.
- OSTI ID:
- 20860656
- Journal Information:
- Applied Physics Letters, Vol. 89, Issue 5; Other Information: DOI: 10.1063/1.2240114; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
Similar Records
X-ray diffraction mapping of strain fields and chemical composition of SiGe:Si(001) quantum dot molecules
Investigation of indium distribution in InGaAs/GaAs quantum dot stacks using high-resolution x-ray diffraction and Raman scattering
Direct observation of strain in InAs quantum dots and cap layer during molecular beam epitaxial growth using in situ X-ray diffraction
Journal Article
·
Wed Mar 15 00:00:00 EST 2006
· Physical Review. B, Condensed Matter and Materials Physics
·
OSTI ID:20860656
+3 more
Investigation of indium distribution in InGaAs/GaAs quantum dot stacks using high-resolution x-ray diffraction and Raman scattering
Journal Article
·
Sun Jan 15 00:00:00 EST 2006
· Journal of Applied Physics
·
OSTI ID:20860656
+5 more
Direct observation of strain in InAs quantum dots and cap layer during molecular beam epitaxial growth using in situ X-ray diffraction
Journal Article
·
Sat Nov 14 00:00:00 EST 2015
· Journal of Applied Physics
·
OSTI ID:20860656
+3 more