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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2006, Volume 84, Issue 12, Pages 769–774 (Mi jetpl1210)  

This article is cited in 10 scientific papers (total in 10 papers)

CONDENSED MATTER

Electronic theory for itinerant in-plane magnetic fluctuations in $\mathrm{Na_xCoO_2}$

M. M. Korshunovab, I. M. Ereminac, A. O. Shorikovd, V. I. Anisimovd

a L. V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences
b Max-Planck-Institut für Physik komplexer Systeme, D-01187 Dresden, Germany
c Institut für Mathematische Physik and Theoretische Physik, TU Braunschweig, 38106 Braunschweig, Germany
d Institute of Metal Physics, RAS-Ural Division
Abstract: Starting from ab-initio band structure for $\mathrm{Na_xCoO_2}$, we derive the single-electron energies and the effective tight-binding description for the $t_{2g}$ bands using a projection procedure. We find that due to the presence of the next-nearest-neighbor hoppings a local minimum in the electronic dispersion close to the $\Gamma$ point of the first Brillouin zone forms. Therefore, in addition to a large Fermi surface an electron pocket close to the $\Gamma$ point emerges at high doping concentrations. The latter yields the new scattering channel resulting in a peak structure of the itinerant magnetic susceptibility at small momenta. This indicates itinerant in-plane ferromagnetic state above certain critical concentration $x_m$, in agreement with neutron scattering data. Below $x_m$ the magnetic susceptibility shows a tendency towards the antiferromagnetic fluctuations. We estimate the value of $0.56<x_m<0.68$ within the rigid band model and within the Hubbard model with infinite on-site Coulomb repulsion consistent with the experimental phase diagram.
Received: 30.10.2006
English version:
Journal of Experimental and Theoretical Physics Letters, 2006, Volume 84, Issue 12, Pages 650–655
DOI: https://doi.org/10.1134/S0021364006240040
Bibliographic databases:
Document Type: Article
PACS: 31.15.Ar, 71.10.-w, 74.70.-b, 75.40.Cx
Language: English
Citation: M. M. Korshunov, I. M. Eremin, A. O. Shorikov, V. I. Anisimov, “Electronic theory for itinerant in-plane magnetic fluctuations in $\mathrm{Na_xCoO_2}$”, Pis'ma v Zh. Èksper. Teoret. Fiz., 84:12 (2006), 769–774; JETP Letters, 84:12 (2006), 650–655
Citation in format AMSBIB
\Bibitem{KorEreSho06}
\by M.~M.~Korshunov, I.~M.~Eremin, A.~O.~Shorikov, V.~I.~Anisimov
\paper Electronic theory for itinerant in-plane magnetic fluctuations in $\mathrm{Na_xCoO_2}$
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2006
\vol 84
\issue 12
\pages 769--774
\mathnet{http://mi.mathnet.ru/jetpl1210}
\transl
\jour JETP Letters
\yr 2006
\vol 84
\issue 12
\pages 650--655
\crossref{https://doi.org/10.1134/S0021364006240040}
\isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=000244506900004}
\scopus{https://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-33847412342}
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  • This publication is cited in the following 10 articles:
    Citing articles in Google Scholar: Russian citations, English citations
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    Письма в Журнал экспериментальной и теоретической физики Pis'ma v Zhurnal Иksperimental'noi i Teoreticheskoi Fiziki
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