Observation of atomic ordering of triple-period-A and -B type in GaAsBi

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Details zur Publikation

Autorinnen und Autoren: Wu M, Luna E, Puustinen J, Guina M, Trampert A
Zeitschrift: Applied Physics Letters
Jahr der Veröffentlichung: 2014
Band: 105
Heftnummer: 4
Seitenbereich: 041602
ISSN: 0003-6951


We report the observation of atomic ordering of triple-period (TP)-A and -B type in low temperature (LT) grown GaAsBi alloy using transmission electron microscopy (TEM). In addition to previous reports, where only TP-A ordering was identified in III-V alloys, here, we confirm by electron diffraction, high-resolution (HR) TEM, and HR Z-contrast scanning TEM that two ordering variants coexists for LT-GaAsBi. We find that the TP-A ordering variant dominates over the TP-B variant. TP-A domains extend over 50-100 nm (projected lateral width) and are of higher perfection compared to TP-B domains. HR Z-contrast scanning TEM on different domains reveals a variation in the Bi occupancy in the {111} planes with triple period sequence. Since the formation of ordered phases has been directly linked to the occurrence of specific surface reconstructions, our results suggest a correlation between the TP-A and B type domains and the multiple stability of n x 3 and 3 x n reconstructions on the (001) surface of GaAsBi under low temperature growth. (C) 2014 AIP Publishing LLC.

FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

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

Zusätzliche Organisationseinheit(en)
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

Einrichtungen weiterer Autorinnen und Autoren

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


Wu, M., Luna, E., Puustinen, J., Guina, M., & Trampert, A. (2014). Observation of atomic ordering of triple-period-A and -B type in GaAsBi. Applied Physics Letters, 105(4), 041602. https://dx.doi.org/10.1063/1.4891854

Wu, Mingjian, et al. "Observation of atomic ordering of triple-period-A and -B type in GaAsBi." Applied Physics Letters 105.4 (2014): 041602.


Zuletzt aktualisiert 2019-29-05 um 15:45