Upcoming IEEE SCV EDS Evening Meeting:
September 26, 2006 IEEE SCV EDS Meeting:
"Challenges in Modeling Nanoscale Devices"
Speaker: Associate Professor Kurt Stokbro - University of Copenhagen, Denmark
Subject: "Challenges in Modeling Nanoscale Devices"
Location: National Semiconductor, Building 31 Large Auditorium,
955 Kifer Road, Sunnyvale, CA. See the meeting
location map
Time: 6:00 PM - Pizza , 6:15 PM - Lecture
Speaker Contact:
Ranjeet Pancholy
Abstract:
This talk discusses some of the challenges we are facing when electronic devices
are approaching the atomic scale and we need to take into account the quantum
nature of electrons.
In the first part, I will give an introduction to the field of quantum transport,
and describe how the quantum nature of electrons changes the properties of nanoscale
devices and the challenges we face.
The modelling of quantum transport is particularly difficult since the small scale
requires that the quantum nature and the atomic details of the system be accurately
described, while the size of the system often comprises millions of atoms.
Some years ago we introduced the important notion of dividing a nanoscale device
into an active device region and a passive electrode region [1]. In this way,
the simulation can often be limited to describing a few hundred atoms, and it
is possible to calculate the current-voltage characteristics of the device with
ab initio electronic structure techniques [1].
The scheme for ab initio calculation of quantum transport, developed by
Dr. Stokbro and his co-workers, has become the de facto standard for electron
transport calculations, and has laid the foundation for the company
Atomistix A/S.
In the second part of the talk, I will tell the story behind Atomistix, the
theory behind their software products, and some insight gained on using their
software to model the electrical properties of nanoscale devices like carbon
nanotubes[1], 1-D graphene sheets, molecular electronic devices[2], atomic
wires[3], spintronics components or interfaces between different materials[4].
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Upcoming IEEE SCV EDS Evening Meeting:
Abstract (Continued):
Finally I will point towards the current challenges and future directions
within the field of quantum transport and nanoscale modelling and describe
how Atomistix is addressing these challenges[5].
References:
1. Mads Brandbyge, Jose-Luis Mozos, Pablo Ordejon, Jeremy Taylor, and Kurt Stokbro,
Density functional method for nonequilibrium electron transport,
Phys. Rev. B. 65, 165401 (2002).
2. K. Stokbro, J. Taylor and M. Brandbyge,
Do Aviram-Ratner diodes rectify?,
J. of Amer. Chem. Soc. 125(13), 3674 (2003).
3. S. K. Nielsen, M. Brandbyge, K. Hansen, K. Stokbro, J. M. van Ruitenbeek, and F. Besenbacher,
Current-Voltage Curves of Atomic-Sized Transition Metal Contacts:
Why Au is Ohmic and Pt is Not,
Phys. Rev. Lett. 89, 66804 (2002).
4. M. Stilling, K. Stokbro and K. Flensberg,
Crystalline Magnetotunnel Junctions: Fe-MgO-Fe, Fe-FeOMgO-Fe and Fe-AuMgOAu-Fe,
Proceedings of Nanotech 2006, Boston, May, 2006.
5. K. Stokbro and A. Blom,
Challenges in modelling the electrical properties of large-scale nanodevices,
Nanos Guide 2006, Wiley and Sons
Biography:
Dr Kurt Stokbro, born in 1965, is an educated physicist, co-founder and
Vice President of Atomistix A/S. He is also an Associate Professor at
the Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark.
He is coordinating a number of EU and Danish-funded R&D projects,
with a total budget of more than 3 Million Euros.
Dr. Stokbro has published more than 50 papers and review articles in
international journals, held a large number of lectures as an invited
speaker, and has organized three international conferences in nanoscience.
For more information on
Associate Professor Kurt Stokbro
For more information on
Atomistix A/S
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