Low dimensional systems

Negative differential conductivity of bigraphene controlled by an external voltage in a magnetic field

M. B. Belonenko^a, N. G. Lebedev^b, N. N. Yanushkina<sup>b

a</sup> Volgograd Bisiness Institute
^b Volgograd State University

Abstract: The current-voltage characteristic of a graphene bilayer has been calculated using the average electron method in the case of applied strong electric and magnetic fields. In the relaxation time approximation, it has been shown that, in bigraphene in the presence of a constant magnetic field applied in the direction perpendicular to the bigraphene layers, these can arise states with a negative differential conductivity. In addition, the generation of terahertz pulses can be performed in this system over a rather wide range of interlayer voltages.

Received: 12.11.2010
Accepted: 11.01.2011

 English version: Physics of the Solid State, 2011, 53:8, 1694–1698

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