DocumentCode :
3477434
Title :
High-field transport in graphene and carbon nanotubes
Author :
Arora, Vijay K. ; Tan, Michael Loong Peng
Author_Institution :
Fac. of Electr. Eng., Univ. Teknol. Malaysia, Skudai, Malaysia
fYear :
2013
fDate :
3-5 June 2013
Firstpage :
1
Lastpage :
2
Abstract :
Drift response to a high electric field in graphene and carbon nanotubes (CNTs) is delineated using nonequilibrium Arora distribution function (NEADF), a paradigm that is distinctly different from that using the nonequilirium Green function and other theoretical paradigms. In this formalism, the re-organization of randomly oriented velocity vectors is shown to streamline and become unidirectional leading to the saturation of drift velocity and drift current. Experiments on CNTs show the resistance rises in response to the applied voltage that may or may not be independent of temperature depending on degeneracy of the sample. We show that the drift response to the high electric field is consistent with anisotropic NEADF. The formalism so developed explains very well the experimental results, not only in graphene nanostructures, but also in other semiconducting materials. Quantum processes and high-field mechanisms are discussed as linear energy versus momentum relationship in graphene is considered. The results will prove of value to those involved in characterization and performance evaluation of nanoscale devices.
Keywords :
Green´s function methods; carbon nanotubes; graphene; C; carbon nanotubes; drift current; graphene nanostructures; high-field transport; linear energy-momentum relationship; nonequilibrium Arora distribution function; nonequilirium Green´s function; quantum processes; randomly-oriented velocity vectors; semiconducting materials; Nanotubes; ballistic transport; carbon nanotubes; graphene; high-field transport; nonequilibrium statistics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electron Devices and Solid-State Circuits (EDSSC), 2013 IEEE International Conference of
Conference_Location :
Hong Kong
Type :
conf
DOI :
10.1109/EDSSC.2013.6628176
Filename :
6628176
Link To Document :
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