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

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dc.creatorLaverock, J.
dc.creatorDugdale, S. B.
dc.creatorDuffy, J. A.
dc.creatorWooldridge, J.
dc.creatorBalakrishnan, G.
dc.creatorLees, M. R.
dc.creatorZheng, G. -q.
dc.creatorChen, D.
dc.creatorLin, C. T.
dc.creatorAndrejczuk, A.
dc.creatorItou, M.
dc.creatorSakurai, Y.
dc.date2007-08-23
dc.date.accessioned2026-07-07T08:25:12Z
dc.date.available2026-07-07T08:25:12Z
dc.descriptionThe surprise discovery of superconductivity below 5K 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.
dc.identifierhttps://arxiv.org/abs/0708.3133
dc.identifierhttp://arxiv.org/abs/0708.3133
dc.identifierPhysical Review B 76, 052509 (2007)
dc.identifierdoi:10.1103/PhysRevB.76.052509
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/136580
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleElliptical hole pockets in the Fermi surfaces of unhydrated and hydrated sodium cobalt oxides
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