BAND-STRUCTURE AND SUPERCONDUCTING PROPERTIES OF LA3NI2B2N3

被引：14

作者：

MATTHEISS, LF

机构：

[1] AT and T Laboratories, Murray Hill

来源：

SOLID STATE COMMUNICATIONS | 1995年 / 94卷 / 09期

关键词：

SUPERCONDUCTORS; ELECTRONIC BAND STRUCTURE; PHONONS;

D O I：

10.1016/0038-1098(95)00147-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The band properties of La3Ni2B2N3, the first superconducting member (T-c approximate to 13K) of a new family of layered boro-nitride quaternaries, have been calculated with the use of the linear augmented-plane-wave method. The results exhibit distinctive Ni-B-N s-p energy-band features near E(F) which are analogous to those identified previously as the origin of phonon-mediated superconductivity in the related lanthanide boro-carbides LnNi(2)B(2)C. In both families, broad (similar to 30 eV) s-p bands provide strong electron-phonon coupling near E(F) via high frequency boron a(1g) phonons that dynamically modulate the NiB4 tetrahedral bond angles, while the Ni(3d) electrons are relegated to a secondary role.

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页码：741 / 744

页数：4

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