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Magnetoresistance in inhomogeneous graphene/metal hybrids
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10.1063/1.4793647
/content/aip/journal/jap/113/8/10.1063/1.4793647
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/8/10.1063/1.4793647
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Plot of the calculated as a function of the area fraction fn for different values of the magnetic field, i.e., B = 0.5 T, 1 T, 1.5 T, and 2 T.

Image of FIG. 2.
FIG. 2.

Plot of the calculated as a function of the area fraction fn for different values of the magnetic field, i.e., B = 0.5 T, 1 T, 1.5 T, and 2 T.

Image of FIG. 3.
FIG. 3.

Calculated as a function of the magnetic field for different values of the area fraction , 0.5, and 0.7.

Image of FIG. 4.
FIG. 4.

Calculated as a function of the magnetic field for different values of the area fraction , 0.5, and 0.7.

Image of FIG. 5.
FIG. 5.

Plot of the magnetoresistance versus magnetic field for homogenous and non-homogenous graphene, for three values of the fill factor , 0.65, and 0.8. For non-homogeneous graphene, the value of was used. The structure is shown on the inset where a circular gold shunt is embedded in a circular sheet of graphene. Simulations were performed using a Van der Pauw geometry as indicated.

Image of FIG. 6.
FIG. 6.

Magnetoresistance as a function of the applied magnetic field B, of a shunted graphene structure, for three values of the area fraction of electron puddles. The inset shows the Hall coefficient as a function of the puddles area fraction for B = 0.5 T.

Image of FIG. 7.
FIG. 7.

Dependence of the magnetoresistance on the area fraction fn for a shunted circular graphene structure, for several values of the fill factor and at a magnetic field value of B = 5 T.

Image of FIG. 8.
FIG. 8.

Dependence of the magnetoresistance on the magnetic field for several values of the area fraction of electron puddles, i.e., 0.15, 0.25, 0.35, and 0.45. The inset shows the metallic fishbone structure embedded in a circular graphene sheet, used in the simulation.

Image of FIG. 9.
FIG. 9.

Dependence of the magnetoresistance on the magnetic field for several values of the ratio n/p, i.e., 1, 1.2, 1.4, 1.6, and 2. The inset shows the Hall resistivity for the same values of n/p.

Image of FIG. 10.
FIG. 10.

Dependence of the magnetoresistance on the magnetic field for several values of the contact conductivity , 3 × 10−4, 6 × 10−4, 1 × 10−3, 1 × 10−2, and 1 × 10−1 ( ). The simulation was performed for the fishbone geometry.

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/content/aip/journal/jap/113/8/10.1063/1.4793647
2013-02-27
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetoresistance in inhomogeneous graphene/metal hybrids
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/8/10.1063/1.4793647
10.1063/1.4793647
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