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Large room-temperature quantum linear magnetoresistance in multilayered epitaxial graphene: Evidence for two-dimensional magnetotransport
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10.1063/1.4765656
/content/aip/journal/apl/101/18/10.1063/1.4765656
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/18/10.1063/1.4765656
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Figures

Image of FIG. 1.
FIG. 1.

(a) Raman spectrum acquired from multilayer EG on C-face SiC. The inset shows 2D-band fitted with a single Lorentzian function. Sharper 2D-band (FWHM ∼ 42 cm−1) exhibiting a good quality EG film used in this study. (b) AFM image of EG film on C-face SiC.

Image of FIG. 2.
FIG. 2.

(a) MR (%) at different temperatures T from 300 to 2 K in magnetic field B range of −9 to 9 T. (b) The separated view of (a) from 300 to 50 K, exhibiting LMR at 300 to below 50 K, with no evidence of negative MR. A separated view of (a) from 20 to 2 K, showing the evolution of negative MR (WL peak around B = 0 T).

Image of FIG. 3.
FIG. 3.

Angular dependent MR and WL MR investigations in EG. (a) A schematic showing the sample rotation and hence varying the magnetic field B direction θ from normal (indicated upward as red arrow) to the sample. (b) Magnetic field anisotropy effect on WL MR, showing a little but non-vanishing negative MR when B is parallel (90°, in-plane) to sample surface and current direction. (c) Magnetoconductivity from 20 to 2 K in low field regime is found to fit with WL model. The dots are data while solid lines are fits to the data using WL model (see Ref. 35), a scaling along y axis by a factor of 0.10 is adopted in order to fit the data. (d) Estimated (phase-coherence length) vs. T. (e) Resistance R vs. the tilt angle θ in a fixed magnetic field B of 9 T at 300 and 2 K.

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/content/aip/journal/apl/101/18/10.1063/1.4765656
2012-11-01
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Large room-temperature quantum linear magnetoresistance in multilayered epitaxial graphene: Evidence for two-dimensional magnetotransport
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/18/10.1063/1.4765656
10.1063/1.4765656
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