Fermi-Surface Shrinking and Interband Coupling in Iron-Based Pnictides

被引：99

作者：

Ortenzi, L. ^{[1
,2
]}

Cappelluti, E. ^{[1
,2
]}

Benfatto, L. ^{[1
,2
,3
]}

Pietronero, L. ^{[1
,2
]}

机构：

[1] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[2] CNR, INFM, SMC Res Ctr, ISC, I-00185 Rome, Italy

[3] Ctr Studi & Ric Enrico Fermi, I-00184 Rome, Italy

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 04期

关键词：

HIGH-TEMPERATURE SUPERCONDUCTIVITY; ELECTRONIC-STRUCTURE; LATTICE VIBRATIONS; BA0.6K0.4FE2AS2; METAL;

D O I：

10.1103/PhysRevLett.103.046404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recent measurements of the Fermi surface with de Haas-van Alphen oscillations in LaFePO showed a shrinking of the Fermi pockets with respect to first-principle calculations, suggesting an energy shift of the hole and electrons bands with respect to local-density approximations. We show that this shift is a natural consequence of the strong particle-hole asymmetry of electronic bands in pnictides, and that it provides an indirect experimental evidence of a dominant interband scattering in these systems.

引用

页数：4

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