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Issue 25, 2014
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Enhanced thermoelectric efficiency in ferromagnetic silicene nanoribbons terminated with hydrogen atoms

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Abstract

Using ab initio methods we calculate thermoelectric and spin thermoelectric properties of silicene nanoribbons with bare, mono-hydrogenated and di-hydrogenated edges. Asymmetric structures, in which one edge is either bare or di-hydrogenated while the other edge is mono-hydrogenated (0H–1H and 2H–1H nanoribbons), have a ferromagnetic ground state and display remarkable conventional and spin thermoelectric properties. Strong enhancement of the thermoelectric efficiency, both conventional and spin ones, results from a very specific band structure of such nanoribbons, where one spin channel is blocked due to an energy gap while the other spin channel is highly conductive. In turn, 0H–2H and 2H–2H nanoribbons (with one edge being either bare or di-hydrogenated and the other edge being di-hydrogenated) are antiferromagnetic in the ground state. Accordingly, the corresponding spin channels are equivalent, and only conventional thermoelectric effects can occur in these nanoribbons.

Graphical abstract: Enhanced thermoelectric efficiency in ferromagnetic silicene nanoribbons terminated with hydrogen atoms

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Publication details

The article was received on 11 Mar 2014, accepted on 24 Apr 2014 and first published on 01 May 2014


Article type: Paper
DOI: 10.1039/C4CP01039F
Author version available: Download Author version (PDF)
Citation: Phys. Chem. Chem. Phys., 2014,16, 12900-12908
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    Enhanced thermoelectric efficiency in ferromagnetic silicene nanoribbons terminated with hydrogen atoms

    K. Zberecki, R. Swirkowicz, M. Wierzbicki and J. Barnaś, Phys. Chem. Chem. Phys., 2014, 16, 12900
    DOI: 10.1039/C4CP01039F

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