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arXiv · 1504.02328

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

Christopher Coleman·Davie Mtsuko·Chris Botha·Somnath Bhattacharyyaa
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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.

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Christopher Coleman, Davie Mtsuko, Chris Botha, Somnath Bhattacharyyaa. 2015-04-09. Observation of quantum transport features in graphene devices fabricated utilizing a nano-manipulating probe technique. https://arxiv.org/abs/1504.02328

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