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Thermoelectric properties of graphene-like nanoribbon studied from the perspective of symmetry
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Journal Article
Thermoelectric properties of graphene-like nanoribbon studied from the perspective of symmetry
2020
Overview
We have studied the charge and spin thermopower systematically in a ferromagnetic junction of graphene-like zigzag nanoribbon modified by two on-site disorders in the tight-binding model. Symmetries of the transmission spectra and geometry configuration of the two disorders are important factors in determining the thermoelectric properties of the system. Conditions to achieve pure charge and pure spin thermopower are discussed from the perspective of symmetry. Symmetry breaking is required sometimes to obtain large figure of merit. The type and strength of the disorders can be used to further manipulate the spin polarization of thermal current. Disorders inside nanoribbon instead of on edge can then be used to finely tune the performance of the junction. The results may have great application value in designing thermoelectric devices.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
