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- W2963904554 abstract "Quantized magnetotransport is observed in 5.6 × 5.6 mm2 epitaxial graphene devices, grown using highly constrained sublimation on the Si-face of SiC(0001) at high temperature (1900 °C). The precise quantized Hall resistance of Rxy=h2e2 is maintained up to record level of critical current Ixx = 0.72 mA at T = 3.1 K and 9 T in a device where Raman microscopy reveals low and homogeneous strain. Adsorption-induced molecular doping in a second device reduced the carrier concentration close to the Dirac point (n ≈ 1010 cm−2), where mobility of 18760 cm2/V is measured over an area of 10 mm2. Atomic force, confocal optical, and Raman microscopies are used to characterize the large-scale devices, and reveal improved SiC terrace topography and the structure of the graphene layer. Our results show that the structural uniformity of epitaxial graphene produced by face-to-graphite processing contributes to millimeter-scale transport homogeneity, and will prove useful for scientific and commercial applications." @default.
- W2963904554 created "2019-07-30" @default.
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- W2963904554 date "2017-05-01" @default.
- W2963904554 modified "2023-10-17" @default.
- W2963904554 title "Epitaxial graphene homogeneity and quantum Hall effect in millimeter-scale devices" @default.
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- W2963904554 doi "https://doi.org/10.1016/j.carbon.2016.12.087" @default.
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