%0 Journal Article 
%A Flores Gallegos, Sara
%A Fernández de los Reyes, Daniel
%A Braza Blanco, María Verónica
%A Richards, R. D.
%A Bastiman, F.
%A Ben Fernández, Teresa
%A Ruiz Martín, Nazaret
%A David, John P. R.
%A González Robledo, David
%T Modelling of bismuth segregation in InAsBi/InAs superlattices: Determination of the exchange energies
%D 2019
%@ 01694332
%U http://hdl.handle.net/10498/30881
%X 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 (E1, 1.26 ± 0.01 eV and E2, 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.
%K Bismuthide
%K Exchange energies
%K InAsBi
%K Segregation
%~ Universidad de Cádiz