Abstract
We have grown large single crystals of SrNbO3.4+d (d∼0.03) with n=5 in the homologous series SrnNbnO3n+2 by using a traveling solvent floating-zone method and measured resistivity, thermopower, and thermal conductivity along all crystallographic axes. The thermoelectric properties are found to be highly anisotropic, which reflects a quasi-one-dimensional electronic structure. In particular, the thermopower along the b axis is -170 μV/K at 300 K, which is 1 order of magnitude higher than the -15 μV/K along the a axis and -25 μV/K along the c axis. A possible origin of the high anisotropy in the thermopower is discussed in terms of dimensional crossover associated with a structural modification.
| Original language | English |
|---|---|
| Article number | 085118 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 84 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2011 Aug 23 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Kobayashi, W., Hayashi, Y., Matsushita, M., Yamamoto, Y., Terasaki, I., Nakao, A., Nakao, H., Murakami, Y., Moritomo, Y., Yamauchi, H., & Karppinen, M. (2011). Anisotropic thermoelectric properties associated with dimensional crossover in quasi-one-dimensional SrNbO3.4+d (d∼0.03). Physical Review B - Condensed Matter and Materials Physics, 84(8), [085118]. https://doi.org/10.1103/PhysRevB.84.085118