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Atomistic Understanding of a Single Gated Dopant Atom in a MOSFET

Published online by Cambridge University Press:  01 February 2011

Gabriel Lansbergen
Affiliation:
G.P.Lansbergen@tudelft.nl, TU Delft, Kavli institute of nanoscience, Brasserskade 18, Delft, 2612 CE, Netherlands, 0031614191565
Rajib Rahman
Affiliation:
rrahman@purdue.edu, Purdue University, Network for Computational Nanotechnology, West Lafayette, IN, 47907, United States
Cameron Wellard
Affiliation:
cameronw@unimelb.edu.au, University of Melbourne, Center for Quantum Computer Technology, Melbourne, VIC 3010, Australia
Jaap Caro
Affiliation:
J.Caro@tudelft.nl, TU Delft, Kavli institute of nanoscience, Delft, 2628 CJ, Netherlands
Nadine Collaert
Affiliation:
collaert@imec.be, IMEC, Leuven, 3001, Belgium
Serge Biesemans
Affiliation:
s.biesemans@imec.be, IMEC, Leuven, 3001, Belgium
Gerhard Klimeck
Affiliation:
gekco@purdue.edu, Purdue University, Network for Computational Nanotechnology, West Lafayette, IN, 47907, United States
Lloyd Hollenberg
Affiliation:
lloydch@unimelb.edu.au, University of Melbourne, Center for Quantum Computer Technology, Melbourne, VIC 3010, Australia
Sven Rogge
Affiliation:
s.rogge@tudelft.nl, TU Delft, Kavli institute of nanoscience, Delft, 2628 CJ, Netherlands
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Abstract

Current semiconductor devices have been scaled to such dimensions that we need take an atomistic approach to understand their characteristics. The atomistic nature of these devices provides us with a tool to study the physics of very small ensembles of dopants right up to the limit of a single atom. Control and understanding of a dopants wavefunction and its coupling to the environment in a nanostructure could proof a key ingredient for device technology beyond-CMOS. Here, we will discuss the eigenlevels and transport characteristics a single gated As donor. The donor is incorporated in the channel of wrap-around gate transistors (FinFETs). The measured level spectrum is shown to consist of levels associated with the donors Coulomb potential, levels associated with a triangular well at the gate interface and hybridized combinations of the two. The level spectrum of this system can be well described by a NEMO-3D model, which is based on a numerical tight-binding approximation.

Type
Research Article
Copyright
Copyright © Materials Research Society 2008

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References

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