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Radial Growth Model for Conical Nanobridge in Resistive Switching Memory Devices

Published online by Cambridge University Press:  22 April 2013

Tong Liu ,
Yuhong Kang ,
Sarah El-Helw ,
Tanmay Potnis  and
Marius Orlowski
Tong Liu
Affiliation:
Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, U.S.A.
Yuhong Kang
Affiliation:
Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, U.S.A.
Sarah El-Helw
Affiliation:
Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, U.S.A.
Tanmay Potnis
Affiliation:
Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, U.S.A.
Marius Orlowski
Affiliation:
Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, U.S.A.
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Abstract

A phenomenological model has been proposed for the radial growth of the copper or silver nanobridge in the conductive bridge random access memory devices. In this model, the growth rate of the bridge is proportional to the local ion flux based on the hopping mechanism. Due to the differences of the local electric field, the growth rate is different along a conical shape nanobridge. The model accounts for the growth rate difference by introducing a geometrical form factor. Based on the model, the top and bottom radii are predicted for truncated conical copper nanobridge. The model is validated with data obtained on Cu/TaOx/Pt resistive devices.

Keywords

memorymicroelectronicsnanoscale
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1562: Symposium DD – Emerging Materials and Devices for Future Nonvolatile Memories , 2013 , mrss13-1562-dd08-04
Copyright
Copyright © Materials Research Society 2013

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References

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