Title:
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Characterization of the electrical properties of individual tin-oxide nanowires contacted to platinum nanoelectrodes
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Author:
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Hernández Ramírez, Francisco; Tarancón Rubio, Albert; Casals Guillén, Olga; Pellicer, Eva; Rodríguez, J.; Romano Rodríguez, Alberto; Morante i Lleonart, Joan Ramon; Barth, S.; Mathur, S.
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Other authors:
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Universitat de Barcelona |
Abstract:
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A simple and useful experimental alternative to field-effect transistors for measuring electrical properties
free electron concentration nd, electrical mobility , and conductivity in individual nanowires has been
developed. A combined model involving thermionic emission and tunneling through interface states is proposed
to describe the electrical conduction through the platinum-nanowire contacts, fabricated by focused ion
beam techniques. Current-voltage I-V plots of single nanowires measured in both two- and four-probe
configurations revealed high contact resistances and rectifying characteristics. The observed electrical behavior
was modeled using an equivalent circuit constituted by a resistance placed between two back-to-back Schottky
barriers, arising from the metal-semiconductor-metal M-S-M junctions. Temperature-dependent I-V measurements
revealed effective Schottky barrier heights up to BE= 0.4 eV. |
Subject(s):
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-Superconductivitat -Espintrònica -Superconductivity -Electronic structure and electrical properties of surfaces |
Rights:
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(c) The American Physical Society, 2007
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Document type:
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Article Article - Published version |
Published by:
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The American Physical Society
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