Physics – Condensed Matter – Materials Science
Scientific paper
2001-11-05
Physics
Condensed Matter
Materials Science
11 pages, 4 figures, to be published in Physical Review B
Scientific paper
10.1103/PhysRevB.64.241104
A TiS$_{2}$ crystal with a layered structure was found to have a large thermoelectric power factor.The in-plane power factor $S^{2}/ \rho$ at 300 K is 37.1~$\mu$W/K$^{2}$cm with resistivity ($\rho$) of 1.7 m$\Omega$cm and thermopower ($S$) of -251~$\mu$V/K, and this value is comparable to that of the best thermoelectric material, Bi$_{2}$Te$_{3}$ alloy. The electrical resistivity shows both metallic and highly anisotropic behaviors, suggesting that the electronic structure of this TiS$_{2}$ crystal has a quasi-two-dimensional nature. The large thermoelectric response can be ascribed to the large density of state just above the Fermi energy and inter-valley scattering. In spite of the large power factor, the figure of merit, $ZT$ of TiS$_{2}$ is 0.16 at 300 K, because of relatively large thermal conductivity, 68~mW/Kcm. However, most of this value comes from reducible lattice contribution. Thus, $ZT$ can be improved by reducing lattice thermal conductivity, e.g., by introducing a rattling unit into the inter-layer sites.
Imai Hiroshi
Kubo Yoshio
Shimakawa Yuichi
No associations
LandOfFree
Large Thermoelectric Power Factor in TiS2 Crystal with Nearly Stoichiometric Composition does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Large Thermoelectric Power Factor in TiS2 Crystal with Nearly Stoichiometric Composition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large Thermoelectric Power Factor in TiS2 Crystal with Nearly Stoichiometric Composition will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-591684