Properties of Josephson junctions involving the cos(kx)•cos(ky) pairing state in iron pnictides

被引：39

作者：

Tsai, Wei-Feng ^{[1
]}

Yao, Dao-Xin ^{[1
]}

Bernevig, B. Andrei ^{[2
]}

Hu, JiangPing ^{[1
]}

机构：

[1] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA

[2] Princeton Univ, Princeton Ctr Theoret Sci, Princeton, NJ 08544 USA

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 01期

关键词：

bound states; Cooper pairs; Fermi surface; iron compounds; Josephson effect; superconductor-normal-superconductor devices; NODELESS SUPERCONDUCTING GAPS; LAYERED SUPERCONDUCTOR; SURFACE;

D O I：

10.1103/PhysRevB.80.012511

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We propose a trilayer pi-junction that takes advantage of the unconventional s(x)(2)y(2)=cos k(x) cos k(y) pairing symmetry which changes sign between electron and hole Fermi pockets in the iron pnictides. In addition, we also present theoretical results for Andreev bound states in thin superconductor-normal metal (or insulator) iron-pnictide junctions. The presence of nontrivial in-gap states, which uniquely appear in this unconventional pairing state, is a distinct feature in comparison to other singlet pairing states.

引用

页数：4

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