Electronic properties of freestanding Ti3C2Tx MXene monolayers

We report on the electrical characterization of single MXene Ti3C2Tx flakes (where T is a surface termination) and demonstrate the metallic nature of their conductivities. We also show that the carrier density can be modulated by an external gate voltage. The density of free carriers is estimated to...

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Bibliographic Details
Published in:Applied physics letters 2016-01, Vol.108 (3), p.033102
Main Authors: Miranda, A., Halim, J., Barsoum, M. W., Lorke, A.
Format: Article
Language:English
Subjects:
Applied physics
Carrier density
Electrical measurement
Electrical properties
MXenes
Resistance
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Summary:We report on the electrical characterization of single MXene Ti3C2Tx flakes (where T is a surface termination) and demonstrate the metallic nature of their conductivities. We also show that the carrier density can be modulated by an external gate voltage. The density of free carriers is estimated to be 8 ± 3 × 1021 cm−3 while their mobility is estimated to be 0.7 ± 0.2 cm2/V s. Electrical measurements, in the presence of a magnetic field, show a small, but clearly discernable, quadratic increase in conductance at 2.5 K.
ISSN:0003-6951
1077-3118
1077-3118
DOI:10.1063/1.4939971