Berlin 2012 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 45: Computational Materials Modelling VI - Thermal Conductivity and Transport
MM 45.6: Vortrag
Donnerstag, 29. März 2012, 11:30–11:45, TC 006
Quantum transport simulations in metallic carbon nanotubes with metal contacts — •Andreas Zienert1, Jörg Schuster2, and Thomas Gessner1,2 — 1Center for Microtechnologies, Chemnitz University of Technology, 09126 Chemnitz, Germany — 2Fraunhofer Research Institution for Electronic Nano Systems, 09126 Chemnitz, Germany
Carbon nanotubes (CNTs) are one dimensional conductors with promising applications in future microelectronic devices and sensors. Due to their high thermal and mechanical stability and their ability to carry high current densities, they are discussed as novel interconnect materials, partially replacing copper metallization in future microelectronic devices. However, the performance will strongly depend on the quality of contacts between CNTs and the environment [1].
The geometric structure of CNT-metal contacts is modeled using density functional theory. A simple approach for contact geometry optimization will be presented. Non-equilibrium Green’s function methods in combination with DFT are used to study electronic transport through metal–CNT–metal devices. Results for different metals will be interpreted in terms of electronic properties of the bulk materials and the contact area.
[1] Zienert et al. Phys. Stat. Sol. B 247, 3002 (2010)