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Published on: April 12, 2018
Electrical characterization of composition modulated In(1-x)Sb(x) nanowire field effect transistors by scanning gate
A A Martinez-Morales1, M Penchev, J Zhong
1Department of Electrical Engineering, University of California, Riverside, California 92521, USA.
Abstract:
In this work high quality crystalline In(1_x)Sb(x) nanowires (NWs) are synthesized via a template-based electrochemistry method. Energy dispersive spectroscopy studies show that composition modulated In(1-x)Sb(x) (x approximately 0.5 or 0.7) nanowires can be attained by selectively controlling the deposition potential during growth. Single In(1-x)Sb(x) nanowire field effect transistors (NW-FETs) are fabricated to study the electrical properties of as-grown NWs. Using scanning gate microscopy (SGM) as a local gate the I(ds)-V(ds) characteristics of the fabricated devices are modulated as a function of the applied gate voltage. Electrical transport measurements show n-type semiconducting behavior for the In0.5Sb0.5 NW-FET, while a p-type behavior is observed for the In0.3Sb0.7 NW-FET device. The ability to grow composition modulated In(1-x)Sb(x) NWs can provide new opportunities for utilizing InSb NWs as building blocks for low-power and high speed nanoscale electronics.
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