Detecting lateral composition modulation in dilute Ga(As, Bi) epilayers

Wu M, Hanke M, Luna E, Puustinen J, Guina M, Trampert A (2015)

Publication Status: Published

Publication Type: Journal article

Publication year: 2015

Journal

Nanotechnology Institute of Physics: Hybrid Open Access

Publisher: IOP PUBLISHING LTD

Book Volume: 26

Pages Range: 425701

Journal Issue: 42

DOI: 10.1088/0957-4484/26/42/425701

Abstract

The ability to characterize a structure into the finest details in a quantitative manner is a key issue to understanding and controlling nanoscale phase separation in novel nanomaterials. In this work, we consider the detectability of lateral composition modulation (LCM), a type of nanoscale phase separation in GaAs1-xBix epilayers, by x-ray diffraction (XRD). We show that the satellite peaks due to LCM are hardly detectable in reasonable time with a lab x-ray diffractometer for GaAs1-xBix samples with an average x up to 25% and relative modulation up to 50%. This is in contrast to LCM reported in other III-V combinations, where the intensity of the satellite peak is relatively high and can be easily detected. Our theoretical considerations are complemented experimentally using highly brilliant synchrotron radiation. The results are in good agreement with the predictions. This work provides a guideline for the systematic characterization of LCM in zincblende III-V semiconductor epilayers and points to the critical role of quantitative characterization of nanoscale phase separation.

Authors with CRIS profile

Mingjian Wu Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Additional Organisation(s)

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

Involved external institutions

Paul-Drude-Institut für Festkörperelektronik - Leibniz-Institut im Forschungsverbund Berlin e.V. DE Germany (DE) Tampere University of Technology FI Finland (FI)

How to cite

APA:

Wu, M., Hanke, M., Luna, E., Puustinen, J., Guina, M., & Trampert, A. (2015). Detecting lateral composition modulation in dilute Ga(As, Bi) epilayers. Nanotechnology, 26(42), 425701. https://dx.doi.org/10.1088/0957-4484/26/42/425701

MLA:

Wu, Mingjian, et al. "Detecting lateral composition modulation in dilute Ga(As, Bi) epilayers." Nanotechnology 26.42 (2015): 425701.

BibTeX: Download