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Thermoelectric power factor in nanostructured materials with randomized nanoinclusions
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Vargiamidis, Vassilios, Foster, Samuel and Neophytou, Neophytos (2018) Thermoelectric power factor in nanostructured materials with randomized nanoinclusions. Physica Status Solidi (a) . 1700997. doi:10.1002/pssa.201700997 ISSN 0031-8965.
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Official URL: http://dx.doi.org/10.1002/pssa.201700997
Abstract
We investigate the electric and thermoelectric transport coefficients of nanocomposites using the Non-Equilibrium Green’s Function (NEGF) method, which can accurately capture the details of geometry and disorder in these structures. We consider here two-dimensional (2D) channels with embedded nanoinclusions (NIs) modelled as potential barriers of cylindrical shape and height VB. We investigate the effect of randomness of the NIs on the thermoelectric power factor by varying the positions, diameter, and heights of the barriers according to a Gaussian probability distribution. We find that the power factor shows indications of tolerance to variations in the parameters of the NIs when the Fermi level is placed into the bands and VB ∼ kBT. These results could be experimentally relevant in the design of nanocomposites for thermoelectric applications.
| Item Type: | Journal Article | ||||||
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| Subjects: | Q Science > QC Physics | ||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
| Library of Congress Subject Headings (LCSH): | Thermoelectricity, Nanostructured materials -- Thermal properties, Nanostructured materials -- Electric properties, Nanocomposites (Materials), Green's functions | ||||||
| Journal or Publication Title: | Physica Status Solidi (a) | ||||||
| Publisher: | Wiley - VCH Verlag GmbH & Co. KGaA | ||||||
| ISSN: | 0031-8965 | ||||||
| Official Date: | 14 April 2018 | ||||||
| Dates: |
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| Article Number: | 1700997 | ||||||
| DOI: | 10.1002/pssa.201700997 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Date of first compliant deposit: | 20 April 2018 | ||||||
| Date of first compliant Open Access: | 14 April 2019 | ||||||
| RIOXX Funder/Project Grant: |
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