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Control of Doping and Electronic Transport in Nanowires

Published online by Cambridge University Press:  15 March 2011

Jianxin Zhong
Affiliation:
Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6016
G. Malcolm Stocks
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6114
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Abstract

We propose a novel concept, namely, delta-doping of nanowires, to control the carrier mobility in nanowires. Different from the traditional doping, our approach features doping of a nanowire only on its surface. Our calculations based on Anderson models for nanowires with surface disorder showed remarkably different results from the traditional doping where impurities are distributed inside the nanowire. We found that there exist transition energy levels similar to the mobility edges in three-dimensional disordered systems. If the Fermi energy is below the transition energy level, the delta-doped nanowire is simply an insulator. But once the Fermi energy exceeds this energy level, the carrier mobility increases significantly. The transition levels are almost independent of the degree of disorder in the regime of strong disorder.

Type
Research Article
Copyright
Copyright © Materials Research Society 2004

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References

[1] Morales, A.M. and Lieber, C.M., Science 279, 208 (1998).Google Scholar
[2] Lauhon, L.J., Gudlksen, M.S., Wang, D. and Lieber, C.M., Nature 420, 57 (2002).Google Scholar
[3] Wu, Y.Y., Fan, R. and Yang, P.D., Nano Lett. 2, 83 (2002)Google Scholar
[4] Bjork, M.T. et al. , Nano Lett. 2, 87 (2002).Google Scholar
[5] Zhong, J.X. and Stocks, G. Malcolm, unpublished.Google Scholar
[6] Lee, P.A. and Ramakrishnan, T.V., Rev. Mod. Phys. 57, 287 (1985).Google Scholar