Phase segregation in Na_x CoO_2 for large Na contents T. A. Platova, I. R. Mukhamedshin, A. V. Dooglav and H. Alloul, JETP Letters , 91, 457 (2010).
Na ordering imprints a metallic kagom´e lattice onto the Co planes of Na2/3CoO2 H. Alloul, I.R. Mukhamedshin, T.A. Platova and A.V. Dooglav, to be published in Europhysics Lett. (2009)
Spin correlations and cobalt charge states: Phase diagram of sodium cobaltates G. Lang, J.Bobroff, H. Alloul, G. Collin, N. Blanchard, Phys.Rev.B 78, 155116 (2008)
Selected for the Editor's suggestions and in Phys Rev Physics spotlights : see the link.
These Guillaume Lang - PHD Thesis (november 2007) : Étude par RMN et muSR des propriétés électroniques et magnétiques des cobaltates de sodium