Modelling of bismuth segregation in InAsBi/InAs superlattices: Determination of the exchange energies

Abstract

InAsBi dilute alloys are potential new candidates for the improvement of infrared optoelectronic devices such as photodetectors or lasers. In this work, InAsBi/InAs superlattices (SLs)with Bi contents ranging between 1 and 3% were grown by molecular beam epitaxy with different Bi fluxes and growth temperatures to analyze Bi segregation by cross sectional transmission electron microscopy techniques. Bi segregation profiles have been described layer-by-layer using a three-layer fluid exchange mechanism, extracting the values of the As/Bi exchange energies (E 1 , 1.26 ± 0.01 eV and E 2 , 1.36 ± 0.02 eV). A relationship to calculate the activation energies for exchange from the binding energies in III–V alloys is proposed, which would allow predicting them for other hitherto unknown compounds.

Metadata

Item Type:	Article
Authors/Creators:	Flores, S. Reyes, D.F. Braza, V. Richards, R.D. https://orcid.org/0000-0001-7043-8372 Bastiman, F. Ben, T. Ruiz-Marín, N. David, J.P.R. https://orcid.org/0000-0002-1105-208X González, D.
Copyright, Publisher and Additional Information:	© 2019 Elsevier. This is an author produced version of a paper subsequently published in Applied Surface Science. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/).
Keywords:	InAsBi; Segregation; Bismuthide; Exchange energies
Dates:	Published: 15 August 2019 Published (online): 22 April 2019 Accepted: 21 April 2019
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield)
Funding Information:	Funder Grant number ROYAL ACADEMY OF ENGINEERING (THE) RF/1516/15/43
Depositing User:	Symplectic Sheffield
Date Deposited:	15 May 2019 11:43
Last Modified:	22 Apr 2020 00:39
Status:	Published
Publisher:	Elsevier
Refereed:	Yes
Identification Number:	10.1016/j.apsusc.2019.04.188
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:146061

Download

Accepted Version

Filename: 2019_Flores_Final author version.pdf

Licence: CC-BY-NC-ND 4.0

CLICK TO DOWNLOAD

[thumbnail of 2019_Flores_Final author version.pdf]

CORE (COnnecting REpositories)

Modelling of bismuth segregation in InAsBi/InAs superlattices: Determination of the exchange energies

Abstract

Metadata

Download

Accepted Version

Export

Statistics