Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7942016 | Superlattices and Microstructures | 2015 | 9 Pages |
Abstract
Thermoelectric effects in a metallic single-wall carbon nanotube in the presence of long-range electrostatic and pseudomagnetic potentials (produced by strain) are considered. It is shown that for strong scattering potentials (chiral tunneling) a pronounced energy ”gap” appears in the energy dependence of electron transmission coefficient. This results in strong violation of Wiedemann-Franz law and in a peak-like behavior of thermopower as a function of chemical potential. The electronic figure-of-merit (ZT) is calculated and shown to be sensitive at low temperatures to nanotube chirality. By tuning chemical potential, ZT can reach high values (ZTâ5) that makes specially engineered nanotube-based thermocouple to be a promising nano-device with a high thermoelectric performance.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
A.V. Parafilo, O.A. Ilinskaya, I.V. Krive, Y.W. Park,