Effect of dynamical Coulomb correlations on the Fermi surface of Na0.3CoO2 -: art. no. 196401

被引：58

作者：

Ishida, H ^{[1
]}

Johannes, MD

Liebsch, A

机构：

[1] Nihon Univ, Coll Humanities & Sci, Tokyo 156, Japan

[2] JST, CREST, Tokyo 156, Japan

[3] USN, Res Lab, Washington, DC 20375 USA

[4] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.94.196401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The t(2g) quasiparticle spectra of Na0.3CoO2 are calculated within the dynamical mean field theory. It is shown that as a result of dynamical Coulomb correlations charge is transferred from the nearly filled e(g)(') subbands to the a(1g) band, thereby reducing orbital polarization among Co t(2g) states. Dynamical correlations therefore stabilize the small e(g)(') Fermi surface pockets, in contrast to angle-resolved photoemission data, which do not reveal these pockets.

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页数：4

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