Journal article

Divacancy superstructures in thermoelectric calcium-doped sodium cobaltate

Abstract:: We have grown single crystals of NaxCayCoO2 and determined their superstructures as a function of composition using neutron and x-ray diffraction. Inclusion of Ca2+ stabilizes a single superstructure across a wide range of temperatures and concentrations. The superstructure in the Na+ layers is based on arrays of divacancy clusters with Ca2+ ions occupying the central site, and it has an ideal concentration Na4/7Ca1/7CoO2. Previous measurements of the thermoelectric properties on this system are discussed in light of this superstructure. Na4/7Ca1/7CoO2 corresponds to the maximum in thermoelectric performance of this system. © 2014 American Physical Society.

Publication status:: Published

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APA Style

Porter, D., Roger, M., Gutmann, M., Uthayakumar, S., Prabhakaran, D., Boothroyd, A., Pandiyan, M. S., & Goff, J. (2014). Divacancy superstructures in thermoelectric calcium-doped sodium cobaltate. Physical Review B, 90(5).

MLA Style

Porter, D., et al. “Divacancy Superstructures in Thermoelectric Calcium-Doped Sodium Cobaltate.” Physical Review B, vol. 90, no. 5, American Physical Society, 2014.

Chicago Style

Porter, D, M Roger, M Gutmann, S Uthayakumar, D Prabhakaran, A Boothroyd, MS Pandiyan, and J Goff. 2014. “Divacancy Superstructures in Thermoelectric Calcium-Doped Sodium Cobaltate.” Physical Review B 90 (5).
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Publisher copy:: 10.1103/PhysRevB.90.054101

Authors

+ Porter, D More by this author

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+ Roger, M More by this author

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+ Gutmann, M More by this author

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+ Uthayakumar, S More by this author

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+ Prabhakaran, D More by this author

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Publisher:: American Physical Society
Journal:: Physical Review B More from this journal
Volume:: 90
Issue:: 5
Publication date:: 2014-08-04
DOI:: 10.1103/PhysRevB.90.054101
EISSN:: 1550-235X
ISSN:: 1098-0121

Language:: English
Pubs id:: pubs:480863
UUID:: uuid:2ec1c2fb-cca5-4aa7-ae1c-7c8c0e3fc9ad
Local pid:: pubs:480863
Source identifiers:: 480863
Deposit date:: 2014-09-14

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Copyright date:: 2014

Licence:: Terms and Conditions of Use for Oxford University Research Archive

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