Elliptical hole pockets in the Fermi surfaces of unhydrated and hydrated sodium cobalt oxides

J. Laverock, S. B. Dugdale, J. A. Duffy, J. Wooldridge, G. Balakrishnan, M. R. Lees, Guo-Qing Zheng, D. Chen, C. T. Lin, A. Andrejczuk, M. Itou, Y. Sakurai

Research output: Contribution to journalArticle

31 Citations (Scopus)

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.

Original languageEnglish
Article number052509
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number5
DOIs
Publication statusPublished - Aug 22 2007

Fingerprint

cobalt oxides
Fermi surface
Fermi surfaces
Cobalt
Sodium
sodium
Compton scattering
Oxides
Superconductivity
casts
Momentum
superconductivity
momentum
X rays
Electrons
Water
scattering
water
electrons
x rays

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Laverock, J., Dugdale, S. B., Duffy, J. A., Wooldridge, J., Balakrishnan, G., Lees, M. R., ... Sakurai, Y. (2007). Elliptical hole pockets in the Fermi surfaces of unhydrated and hydrated sodium cobalt oxides. Physical Review B - Condensed Matter and Materials Physics, 76(5), [052509]. https://doi.org/10.1103/PhysRevB.76.052509

Elliptical hole pockets in the Fermi surfaces of unhydrated and hydrated sodium cobalt oxides. / Laverock, J.; Dugdale, S. B.; Duffy, J. A.; Wooldridge, J.; Balakrishnan, G.; Lees, M. R.; Zheng, Guo-Qing; Chen, D.; Lin, C. T.; Andrejczuk, A.; Itou, M.; Sakurai, Y.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 76, No. 5, 052509, 22.08.2007.

Research output: Contribution to journalArticle

Laverock, J, Dugdale, SB, Duffy, JA, Wooldridge, J, Balakrishnan, G, Lees, MR, Zheng, G-Q, Chen, D, Lin, CT, Andrejczuk, A, Itou, M & Sakurai, Y 2007, 'Elliptical hole pockets in the Fermi surfaces of unhydrated and hydrated sodium cobalt oxides', Physical Review B - Condensed Matter and Materials Physics, vol. 76, no. 5, 052509. https://doi.org/10.1103/PhysRevB.76.052509
Laverock, J. ; Dugdale, S. B. ; Duffy, J. A. ; Wooldridge, J. ; Balakrishnan, G. ; Lees, M. R. ; Zheng, Guo-Qing ; Chen, D. ; Lin, C. T. ; Andrejczuk, A. ; Itou, M. ; Sakurai, Y. / Elliptical hole pockets in the Fermi surfaces of unhydrated and hydrated sodium cobalt oxides. In: Physical Review B - Condensed Matter and Materials Physics. 2007 ; Vol. 76, No. 5.
@article{1d051f8734d34347b5582b8fc23a9f65,
title = "Elliptical hole pockets in the Fermi surfaces of unhydrated and hydrated sodium cobalt oxides",
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.",
author = "J. Laverock and Dugdale, {S. B.} and Duffy, {J. A.} and J. Wooldridge and G. Balakrishnan and Lees, {M. R.} and Guo-Qing Zheng and D. Chen and Lin, {C. T.} and A. Andrejczuk and M. Itou and Y. Sakurai",
year = "2007",
month = "8",
day = "22",
doi = "10.1103/PhysRevB.76.052509",
language = "English",
volume = "76",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "5",

}

TY - JOUR

T1 - Elliptical hole pockets in the Fermi surfaces of unhydrated and hydrated sodium cobalt oxides

AU - Laverock, J.

AU - Dugdale, S. B.

AU - Duffy, J. A.

AU - Wooldridge, J.

AU - Balakrishnan, G.

AU - Lees, M. R.

AU - Zheng, Guo-Qing

AU - Chen, D.

AU - Lin, C. T.

AU - Andrejczuk, A.

AU - Itou, M.

AU - Sakurai, Y.

PY - 2007/8/22

Y1 - 2007/8/22

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=34548210845&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34548210845&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.76.052509

DO - 10.1103/PhysRevB.76.052509

M3 - Article

AN - SCOPUS:34548210845

VL - 76

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 5

M1 - 052509

ER -