molecular devices – TechConnect Briefs

Principles of Metallic Field Effect Transistor (METFET)

Rotkin S.V., Hess K., University of Illinois at Urbana-Champaign, Beckman Institute for Advanced Science and Technology, US

Field effect transistors in current use are semiconductor devices. The scaling trend to nanometer dimensions calls for ever higher doping and channel conductance of these devices. Ultimately one desires a conductance close to that of [...]

Convergence Issues in Ab-initio Transport Calculation through Oxide Barriers and Molecules

Fonseca L.R.C., Demkov A.A., Motorola, Inc., US

Ab-initio calculations of transport through nanometer scale structures, such as individual atoms or molecules and ultra-thin oxide barriers directly link atomic structure and chemistry, which are difficult to probe, to transport properties, which are easier [...]

Structure and Environment Influence in DNA Conduction

Adessi Ch., Walch S., Anantram M.P., NASA Ames Research Center, US

Results for transmission through poly(G) DNA molecules are presented. We show that a modification of the rise of a B-DNA form can induce a shift of the conduction channel toward the valence one. We clearly [...]

Electronic Transport in Molecular Devices from First Principles

Di Ventra M., Lang N.D., Pantelides S.T., Virginia Tech, US

We present an overview of recent work by the authors in first-principles calculations of electronic transport in molecules for which experimental results are available. We find that the shape of the current-voltage characteristics is mostly [...]