AI Article Synopsis
- The study investigates how carrier density affects electrical conductivity in mono-, bi-, and trilayer graphene using electric double-layer transistors, achieving densities over 10^14 cm^(-2).
- It finds that while monolayer graphene's conductivity reaches a plateau, bi- and trilayer graphene show a complex behavior due to higher-energy band filling, leading to increased conductivity and quantum capacitance.
- The results highlight the potential of ion-gated graphene for practical applications, demonstrating its resilience in high-density transport scenarios.
Article Abstract
We present a comparative study of high carrier density transport in mono-, bi-, and trilayer graphene using electric double-layer transistors to continuously tune the carrier density up to values exceeding 10(14) cm(-2). Whereas in monolayer the conductivity saturates, in bi- and trilayer filling of the higher-energy bands is observed to cause a nonmonotonic behavior of the conductivity and a large increase in the quantum capacitance. These systematic trends not only show how the intrinsic high-density transport properties of graphene can be accessed by field effect, but also demonstrate the robustness of ion-gated graphene, which is crucial for possible future applications.
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Source |
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3156196 | PMC |
| http://dx.doi.org/10.1073/pnas.1018388108 | DOI Listing |
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