Resistance simulations for junctions of SW and MW carbon nanotubes with various metal substrates

• Authors: Yuri Shunin , Yuri Zhukovskii , Natalia Burlutskaya , Stefano Bellucci
• Languages of publication: EN

Abstracts

EN

This theoretical study focuses on junctions between the carbon nanotubes (CNTs) and contacting metallic elements of a nanocircuit. Numerical simulations on the conductance and resistance of these contacts have been performed using the multiple scattering theory and the effective media cluster approach. Two models for CNT-metal contacts have been considered in this paper: a) first principles “liquid metal” model and b) semi-empirical model of “effective bonds” based on Landauer notions on ballistic conductivity. Within the latter, which is a more adequate description of chirality effects, we have simulated both single-wall (SW) and multi-wall (MW) CNTs with different morphology. Results of calculations on resistance for different CNT-Me contacts look quantitatively realistic (from several to hundreds kOhm, depending on chirality, diameter and thickness of MW CNT). The inter-wall transparency coefficient for MW CNT has been also simulated, as an indicator of possible ‘radial current’ losses.

Keywords

EN

Carbon nanotubes; SW and MW morphology; junction between the CNT and metal substrate; scattering theory; electronic structure calculations; resistance of CNT-Me contact; inter-wall transparency in MW CNTs

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2011
• Volume: 9
• Issue: 2
• Pages: 519-529

Dates

published

1 - 4 - 2011

online

20 - 2 - 2011

Contributors

author

Yuri Shunin

author

Yuri Zhukovskii

• Institute of Solid State Physics, University of Latvia, Riga, Latvia

author

Natalia Burlutskaya

• Information Systems Management Institute, Riga, Latvia

author

Stefano Bellucci

• INFN-Laboratori Nazionali di Frascati, Via Enrico Fermi 40, Frascati, Italy

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Identifiers

DOI

10.2478/s11534-010-0086-9