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Observation of chiral quantum-Hall edge states in graphene
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10.1063/1.3123265
/content/aip/journal/apl/94/16/10.1063/1.3123265
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/16/10.1063/1.3123265
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) An optical microscopic image of the sample and the measurement configuration (the scale bar represents ). The black lines represent the boundary of the graphene. Switches connected to the EC electrodes are used to control grounding the electrodes B and C. The current is measured at the drain D. (b) The BG voltage dependence of the resistance in zero magnetic field, which illustrates a bipolar electric field effect. Inset: energy-momentum dispersion relations in the hole side; (left) and in the electron side; (right). (c) Schematic configuration of the clockwise QH edge-state circulation in the hole side at positive with no grounded ECs.

Image of FIG. 2.
FIG. 2.

(a) Two-terminal conductance as a function of a BG voltage difference in 9 T. Open circle: no grounded ECs. Open square: the EC grounded at C. Open triangle: the EC grounded at B. (b,c) Schematic configurations of the clockwise QH edge state circulation (for hole side and positive ) corresponding to the recovery and the reduction of , respectively, in conductance plateaus.

Image of FIG. 3.
FIG. 3.

(a) Two-terminal conductance as a function of a BG voltage difference in −9 T. Open circle: no grounded ECs. Open square: the EC grounded at C. Open triangle: the EC grounded at B. (b,c) Schematic configurations of the counterclockwise QH edge state circulation (for hole side and positive ) corresponding to the reduction and the recovery of , respectively, in conductance plateaus.

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/content/aip/journal/apl/94/16/10.1063/1.3123265
2009-04-23
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Observation of chiral quantum-Hall edge states in graphene
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/16/10.1063/1.3123265
10.1063/1.3123265
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