Abstract
Abstract The thermopower S and thermoconductance κ properties of graphene nanoribbon based three terminal thermoelectric module are studied theoretically in two cases: with magnetic field and without magnetic field. By using the non-equilibrium Greenʼs function method combined with the Landauer–Buttiker formula, the electric current and linear electrical conductance through the system is obtained. The S – E F curves show a series of peaks and dips and κ – E F curves show plateau structures. The κ – E F relation is roughly linear when there is no magnetic field and is parabolic when in the quantum Hall regime because of the unique Dirac fermion in graphene. The dependence of S and κ on the on-site energy of the terminals, sample size and Anderson disorder are investigated as well.
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