Dresden 2009 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 35: Poster Session II
MM 35.1: Poster
Mittwoch, 25. März 2009, 16:30–18:30, P4
Theoretical study of geometry dependent I-V characteristics of copper and gold quantum point contacts — •Saeideh Mohammadzadeh1, Reinhard Streiter1,2, and Thomas Gessner1,2 — 1Center of Microtechnologies, Chemnitz University of Technology, Chemnitz, Germany — 2Fraunhofer Research Institution for Electronic Nano Systems, ENAS, Chemnitz, Germany
Quantum point contacts have attracted significant attention with continuing miniaturization of nanoscale electronic components for the two past decades. In present work, we study the electronic transport properties of copper and gold quantum point contacts using the non-equilibrium Green’s function technique on the density functional tight binding method for modelling the geometry dependent I-V characteristics. The copper and gold quantum point contacts are sandwiched between cognate (001) electrodes and the electronic current is deduced according to the Landauer formulation to study the effect of the quantum point contact length scales and geometry defects on the electronic transport properties. The transmission coefficients, conductance and the voltage drop characteristics are calculated as well.