Laverock, J., Dugdale, S. B., Duffy, J. A., Wooldridge, J., Balakrishnan, Geetha, Lees, Martin R., Zheng, G.-Q., Chen, D., Lin, C. T., Andrejczuk, A., Itou, M. and Sakurai, Y. (2007) Elliptical hole pockets in the Fermi surfaces of unhydrated and hydrated sodium cobalt oxides. Physical Review B, Vol.76 (No.5). Article: 052509. doi:10.1103/PhysRevB.76.052509 ISSN 1098-0121.

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Abstract

The surprise discovery of superconductivity below 5 K in sodium cobalt oxides when hydrated with water has caught the attention of experimentalists and theorists alike. Most explanations for its occurence have focused heavily on the properties of some small elliptically shaped pockets predicted to be the electronically dominant Fermi surface sheet, but direct attempts to look for them have instead cast serious doubts over their existence. Here we present evidence that these pockets do indeed exist, based on bulk measurements of the electron momentum distribution in unhydrated and hydrated sodium cobalt oxides using the technique of x-ray Compton scattering.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title:	Physical Review B
Publisher:	American Physical Society
ISSN:	1098-0121
Official Date:	August 2007
Dates:	Date Event August 2007 Published
Volume:	Vol.76
Number:	No.5
Number of Pages:	4
Page Range:	Article: 052509
DOI:	10.1103/PhysRevB.76.052509
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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