Anisotropic thermoelectric properties associated with dimensional crossover in quasi-one-dimensional SrNbO3.4+d (d ~ 0.03)

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2011
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en
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1-6
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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.
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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 , vol. 84 , no. 8 , 085118 , pp. 1-6 . https://doi.org/10.1103/PhysRevB.84.085118