Electronic properties and fermi surface for new Fe-free layered pnictide-oxide superconductor BaTi2Bi2O from first principles

被引：0
|
作者：
D. V. Suetin
A. L. Ivanovskii
机构：
[1] Russian Academy of Sciences,Institute of Solid State Chemistry, Ural Branch
来源：
JETP Letters | 2013年 / 97卷
关键词：
Fermi Level; Fermi Surface; JETP Letter; Spin Density Wave; Increase Transition Temperature;
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摘要：
Very recently, as an important step in the development of layered Fe-free pnictide-oxide superconductors, the new phase BaTi2Bi2O was discovered which has the highest TC value (∼4.6 K) among all related undoped systems. In this Letter, we report for the first time the electronic bands, Fermi surface topology, total and partial densities of electronic states for BaTi2Bi2O obtained by means of the ab initio FLAPW-GGA calculations. The interatomic bonding picture is described as a high-anisotropic mixture of metallic, covalent, and ionic contributions. The structural and electronic factors, which can be responsible for the increased transition temperature for BaTi2Bi2O (as compared with related pnictide-oxides BaTi2As2O and BaTi2Sb2O), are also discussed.
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页码：220 / 225
页数：5
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