A tight-binding investigation of the NaxCoO2 Fermi surface

被引：27

作者：

Johannes, MD ^{[1
]}

Papaconstantopoulos, DA ^{[1
]}

Singh, DJ ^{[1
]}

Mehl, MJ ^{[1
]}

机构：

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

来源：

EUROPHYSICS LETTERS | 2004年 / 68卷 / 03期

关键词：

D O I：

10.1209/epl/i2004-10254-x

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We perform an orthogonal basis tight-binding fit to an LAPW calculation of paramagnetic NaxCoO2 for several dopings. The optimal position of the apical oxygen at each doping is resolved, revealing a non- trivial dependence of the band structure and Fermi surface on oxygen height. We find that the small e'(g) hole pockets are preserved throughout all investigated dopings and discuss some possible reasons for the lack of experimental evidence for these Fermi sheets.

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页码：433 / 439

页数：7

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