Article (Scientific journals)
Ab initio study of hydrogenic effective mass impurities in Si nanowires
Peelaers, Hartwin; Durgun, Engin; Partoens, Bart et al.
2017In Journal of Physics: Condensed Matter, 29, p. 095303
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Keywords :
CESAM; Q-MAT; CECI
Abstract :
[en] The effect of B and P dopants on the band structure of Si nanowires is studied using electronic structure calculations based on density functional theory. At low concentrations a dispersionless band is formed, clearly distinguishable from the valence and conduction bands. Although this band is evidently induced by the dopant impurity, it turns out to have purely Si character. These results can be rigorously analyzed in the framework of effective mass theory. In the process we resolve some common misconceptions about the physics of hydrogenic shallow impurities, which can be more clearly elucidated in the case of nanowires than would be possible for bulk Si. We also show the importance of correctly describing the effect of dielectric confinement, which is not included in traditional electronic structure calculations, by comparing the obtained results with those of G0W0 calculations.
Research center :
CESAM - Complex and Entangled Systems from Atoms to Materials - ULiège
Disciplines :
Physics
Author, co-author :
Peelaers, Hartwin
Durgun, Engin
Partoens, Bart
Bilc, Daniel
Ghosez, Philippe  ;  Université de Liège > Département de physique > Physique théorique des matériaux
Van de Walle, Chris
Peeters, François
Language :
English
Title :
Ab initio study of hydrogenic effective mass impurities in Si nanowires
Publication date :
2017
Journal title :
Journal of Physics: Condensed Matter
ISSN :
0953-8984
eISSN :
1361-648X
Publisher :
Institute of Physics, Bristol, United Kingdom
Volume :
29
Pages :
095303
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
Funders :
CÉCI - Consortium des Équipements de Calcul Intensif [BE]
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since 08 March 2017

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