Anisotropic thermoelectric properties associated with dimensional crossover in quasi-one-dimensional SrNbO3.4+d(d~0.03)
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© 2011 American Physical Society (APS). This is the accepted version of the following article: Kobayashi, W. & Hayashi, Y. & Matsushita, M. & Yamamoto, Y. & Terasaki, I. & Nakao, A. & Nakao, H. & Murakami, Y. & Moritomo, Y. & Yamauchi, H. & Karppinen, Maarit. 2011. Anisotropic thermoelectric properties associated with dimensional crossover in quasi-one-dimensional SrNbO3.4+d(d~0.03). Physical Review B. Volume 84, Issue 8. 085118/1-6. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.84.085118, which has been published in final form at http://journals.aps.org/prb/abstract/10.1103/PhysRevB.84.085118.
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School of Chemical Technology |
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2011
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Language
en
Pages
085118/1-6
Series
Physical Review B, Volume 84, Issue 8
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.Description
Keywords
crystals, thermoelectric properties, electronic structures
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Citation
Kobayashi, W. & Hayashi, Y. & Matsushita, M. & Yamamoto, Y. & Terasaki, I. & Nakao, A. & Nakao, H. & Murakami, Y. & Moritomo, Y. & Yamauchi, H. & Karppinen, Maarit. 2011. Anisotropic thermoelectric properties associated with dimensional crossover in quasi-one-dimensional SrNbO3.4+d(d~0.03). Physical Review B. Volume 84, Issue 8. 085118/1-6. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.84.085118.
