English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The study of the strength of correlations in Na$_x$CoO$_2$ is extended to thex=0 end of the phase diagram where Mott insulating behavior has been widelyanticipated. Inclusion of correlation as modeled by the LDA+U approach leads toa Mott transition in the $a_g$ subband if U is no less than U$_c$=2.5 eV. ThusU smaller than U$_c$ is required to model the metallic, nonmagnetic CoO$_2$compound reported by Tarascon and coworkers. The orbital-selective Motttransition of the $a_g$ state, which is essentially degenerate with the$e'_{g}$ states, occurs because of the slightly wider bandwidth of the $a_g$bands. The metal-insulator transition is found to be strongly coupled to theCo-O bond length, due to associated changes in the $t_{2g}$ bandwidth, but thelargest effects occur only at a reduced oxygen height that lies below theequilibrium position.Comment: 8 pages with 9 embedded figure

physical review. b, condensed matter and materials physics

<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi mathvariant="normal">Na</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:mi mathvariant="normal">Co</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>x</mml:mi><mml:mo>→</mml:mo><mml:mn>0</mml:mn></mml:mrow></mml:math>regime: Coupling of structure …

NaxCoO2in thex→0regime: Coupling of structure …