Research on Hall Effect of Graphene by Var Der Pauw Method

Abstract:

Graphene is a two-dimensional material consisting of single atomic layers of graphite. Its quality is markedly different from conventional graphite and semiconductor material. In this paper, electrical conductivity and Hall Effect of the graphene were measured at room temperature by Var der Pauw method. An ohmic contact of the sample and the electrodes was constructed and tested before the measurement of Hall Effect. With the help of the Var der Pauw method, the Hall voltages of the samples were measured under the static magnetic field and different input currents. Sequentially, a series of Hall parameters of graphene were obtained. The results shown that the Hall coefficient R_H is 7.00*10^-7 m³/C; the carrier concentration n is 10.52*10²⁴ m^-3 that is fifteen orders of magnitude bigger than silicon; the Hall element production sensitivity K_H is 6.87*10² m²/C and the carrier mobility was 1,882.54 cm²·V^-1·s^-1 which is much bigger than silicon. The measurement results in this paper can provide some reference for graphene’s research and application in related areas.

• Periodical: Advanced Materials Research (Volumes 1120-1121)
• Pages: 383-387
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1120-1121.383
• Online since: July 2015
• Authors: Yu Xiang Hui, Nan An, Kai Chen, Xiao Jun Li*, Wei Long Li, Zhao Yu Ren
• Keywords: Graphene, Hall Effect, Measurement

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