Spontaneous formation of three-dimensionally ordered Bi-rich nanostructures within GaAs1-xBix/GaAs quantum wells

Journal article
(Original article)


Publication Details

Author(s): Luna E, Wu M, Hanke M, Puustinen J, Guina M, Trampert A
Journal: Nanotechnology
Publisher: Institute of Physics Publishing
Publication year: 2016
Volume: 27
Journal issue: 32
ISSN: 1361-6528
Language: English


Abstract


In this work, we report on the spontaneous formation of ordered arrays of nanometer-sized Bi-rich structures due to lateral composition modulations in Ga(As,Bi)/GaAs quantum wells grown by molecular beam epitaxy. The overall microstructure and chemical distribution is investigated using transmission electron microscopy. The information is complemented by synchrotron x-ray grazing incidence diffraction, which provides insight into the in-plane arrangement. Due to the vertical inheritance of the lateral modulation, the Bi-rich nanostructures eventually shape into a three-dimensional assembly. Whereas the Bi-rich nanostructures are created via two-dimensional phase separation at the growing surface, our results suggest that the process is assisted by Bi segregation which is demonstrated to be strong and more complex than expected, implying both lateral and vertical (surface segregation) mass transport. As demonstrated here, the inherent thermodynamic miscibility gap of Ga(As,Bi) alloys can be exploited to create highly uniform Bi-rich units embedded in a quantum confinement structure.







FAU Authors / FAU Editors

Wu, Mingjian Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)


Additional Organisation
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)


External institutions with authors

Paul-Drude-Institut für Festkörperelektronik - Leibniz-Institut im Forschungsverbund Berlin e.V.
Tampere University of Technology


How to cite

APA:
Luna, E., Wu, M., Hanke, M., Puustinen, J., Guina, M., & Trampert, A. (2016). Spontaneous formation of three-dimensionally ordered Bi-rich nanostructures within GaAs1-xBix/GaAs quantum wells. Nanotechnology, 27(32). https://dx.doi.org/10.1088/0957-4484/27/32/325603

MLA:
Luna, Esperanza, et al. "Spontaneous formation of three-dimensionally ordered Bi-rich nanostructures within GaAs1-xBix/GaAs quantum wells." Nanotechnology 27.32 (2016).

BibTeX: 

Last updated on 2019-29-05 at 09:25