Electronic states and wavefunctions of diatomic donor molecular ions in silicon: multi-valley envelope function theory

[en] Using the Burt–Foreman envelope function theory and effective mass approximation, we develop a theoretical model for an arbitrary number of interacting donor atoms embedded in silicon which reproduces the electronic energy spectrum with high computational efficiency, taking into account the effective mass anisotropy and the valley–orbit coupling. We show that the variation of the relative magnitudes of the electronic coupling between the donor atoms with respect to the valley–orbit coupling as a function of the internuclear distance leads to different kinds of spatial interference patterns of the wavefunction. We also report on the impact of the orientation of the diatomic phosphorus donor molecular ion in the crystal lattice on the ionization energy and on the energy separation between the ground state and the lowest excited state.

Disciplines :

Physics

Author, co-author :

Klymenko, Mykhailo ; Université de Liège > Département de chimie (sciences) > Laboratoire de chimie physique théorique

Remacle, Françoise ; Université de Liège > Département de chimie (sciences) > Laboratoire de chimie physique théorique

Language :

English

Title :

Electronic states and wavefunctions of diatomic donor molecular ions in silicon: multi-valley envelope function theory

Publication date :

2014

Journal title :

Journal of Physics: Condensed Matter

ISSN :

0953-8984

eISSN :

1361-648X

Publisher :

Institute of Physics Publishing, United Kingdom

Volume :

Issue :

Pages :

065302

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://stacks.iop.org/0953-8984/26/i=6/a=065302

European Projects :

FP7 - 318397 - TOLOP - Towards Low Power ICT

Funders :

CE - Commission Européenne [BE]

Available on ORBi :

since 03 June 2015

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