| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Influence of Temperature on the Conductivity of Multi-walled Carbon Nanotube Interconnects |
| LU Qi-Jun, ZHU Zhang-Ming**, YANG Yin-Tang, DING Rui-Xue |
School of Microelectronics, Xidian University, Xi'an 710071
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| Cite this article: |
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LU Qi-Jun, ZHU Zhang-Ming, YANG Yin-Tang et al 2015 Chin. Phys. Lett. 32 047305 |
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Abstract We propose a new conductivity model of multi-walled carbon nanotube (MWCNT) interconnects considering the influence of temperature. For each shell of MWCNT interconnects, it may present the property of ballistic transport or may suffer from acoustic photo and optical phonon (OP) scattering depending on their mean free paths (MFPs) and the wire length. Furthermore, since the MFPs are proportional to the shell diameter, five regions exist in the wire length in which the factors influencing the conductivity are determined. Thus the conductivity is modeled in five cases according to their lengths, and the final obtained model is a 5-piecewise function. By using this model, the influence of temperature on the conductivity is examined and analyzed. It is shown that the conductivity demonstrates different, changing behaviors with the increase of temperature in the five cases. Additionally, the influence of OP scattering on the conductivity does not need to be taken into account at room temperatures, whereas this influence will produce a decline region in the conductivity at high temperatures.
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Received: 08 December 2014
Published: 30 April 2015
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| PACS: |
73.63.-b
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(Electronic transport in nanoscale materials and structures)
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81.07.De
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(Nanotubes)
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85.35.Kt
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(Nanotube devices)
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