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Applied Physics Letters / Volume 97 / Issue 5 / ELECTRONIC TRANSPORT AND SEMICONDUCTORS

Appl. Phys. Lett. 97, 052109 (2010); http://dx.doi.org/10.1063/1.3477959 (3 pages)

Enhancement of thermoelectric efficiency in (Ca,Dy)MnO3–(Ca,Yb)MnO3 solid solutions

Yang Wang1,2, Yu Sui1,3, Xianjie Wang1, and Wenhui Su1

1Department of Physics, Center for Condensed Matter Science and Technology (CCMST), Harbin Institute of Technology, Harbin 150001, People’s Republic of China
2Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
3International Center for Materials Physics, Academia Sinica, Shenyang 110015, People’s Republic of China

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(Received 3 June 2010; accepted 19 July 2010; published online 6 August 2010)

Transport and thermoelectric (TE) properties have been investigated for the (Ca,Dy)MnO3–(Ca,Yb)MnO3 solid solutions. Resistivity is found to be closely correlated with the structural distortions in this system. The enhanced TE efficiency in the solid solutions can be well attributed to the distortion of electronic density of states along with a strong point defect scattering. Such band structure engineering and phonon engineering have resulted in an effective improvement of the TE performance in these solid solutions and could be applied to more systems.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

band structure, calcium compounds, dysprosium compounds, electrical resistivity, electronic density of states, phonons, point defect scattering, point defects, solid solutions, thermoelectricity, ytterbium compounds

PACS

  • 72.20.Pa

    Thermoelectric and thermomagnetic effects

  • 71.20.Ps

    Other inorganic compounds

  • 72.10.Fk

    Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect)

  • 61.72.J-

    Point defects and defect clusters

  • 63.20.D-

    Phonon states and bands, normal modes, and phonon dispersion

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3477959

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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    Y. Wang, Y. Sui, and W. H. Su, J. Appl. Phys. 104, 093703 (2008)JAPIAU000104000009093703000001.

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