Thermoelectric properties of tubular nanowires in the presence of a transverse magnetic field
| Autor: | Movaffaq Kateb, Sigurdur I. Erlingsson, Hadi Rezaie Heris, Andrei Manolescu |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Heat current Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Mechanical Engineering Nanowire FOS: Physical sciences Bioengineering 02 engineering and technology General Chemistry Electron 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Magnetic field Thermal conductivity Mechanics of Materials Seebeck coefficient Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Thermoelectric effect Figure of merit General Materials Science Electrical and Electronic Engineering 0210 nano-technology |
| Popis: | We calculate the charge and heat current associate with electrons, generated by a temperature gradient and chemical potential difference between two ends of a tubular nanowire of 30 nm radius in the presence of an external magnetic field perpendicular to its axis. We consider a nanowire based on a semiconductor material, and use the Landauer-Bttiker approach to calculate the transport quantities. We obtain the variation of the Seebeck coefficient ($S$), thermal conductivity kappa, and the figure of merit ($ZT$), with respect to the temperature up to 20\,K, and with the magnetic field up to 3 T. In particular we show that the Seebeck coefficient can change sign in this domain of parameters. In addition $\kappa$ and $ZT$ have oscillations when the magnetic field increases. These oscillations are determined by the energy spectrum of the electrons. Comment: 6 pages, 6 figures |
| Databáze: | OpenAIRE |
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