Observation of quantum transport features in graphene devices fabricated utilizing a nano-manipulating probe technique

Christopher Coleman; Davie Mtsuko; Chris Botha; Somnath Bhattacharyyaa

Observation of quantum transport features in graphene devices fabricated utilizing a nano-manipulating probe technique

Mesoscale and Nanoscale Physics 2015-04-10 v1

Authors: Christopher Coleman , Davie Mtsuko , Chris Botha , Somnath Bhattacharyyaa

Abstract

A novel method for fast fabrication of mesoscopic multilayered graphene electronic devices utilizing nanoprobes to exfoliate graphite flakes is developed. The magnetoresistance of these devices exhibit pronounced Shubnikov-de Haas oscillations at magnetic fields above 4 T and at temperatures below 30 K. From the analysis of the SdH oscillations we show that multilayer graphene devices have a carrier density and effective mass (m*= 0.042me - 0.083me) comparable to those of bilayer and trilayer graphene. The quantum lifetime in this multilayered graphene is in the range 22 to 90 fs corresponding to a disorder-broadening of 5 to 15 meV.

Keywords

graphene devices quantum transport nano-manipulating probe Shubnikov-de Haas oscillations magnetoresistance effective mass quantum lifetime

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@article{arxiv.1504.02328,
  title  = {Observation of quantum transport features in graphene devices fabricated utilizing a nano-manipulating probe technique},
  author = {Christopher Coleman and Davie Mtsuko and Chris Botha and Somnath Bhattacharyyaa},
  journal= {arXiv preprint arXiv:1504.02328},
  year   = {2015}
}

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Submitted to Journal of Applied Physics

Observation of quantum transport features in graphene devices fabricated utilizing a nano-manipulating probe technique

Abstract

Keywords

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