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

Wei Feng Tsai; Dao Xin Yao; B. Andrei Bernevig; Jiangping Hu

doi:10.1103/PhysRevB.80.012511

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

Wei Feng Tsai, Dao Xin Yao, B. Andrei Bernevig, Jiangping Hu

Research output: Contribution to journal › Article › peer-review

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Abstract

We propose a trilayer π -junction that takes advantage of the unconventional s x2 y2 =cos kx cos ky 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.

Original language	English (US)
Article number	012511
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.80.012511
State	Published - Aug 6 2009

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.80.012511

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abstract = "We propose a trilayer π -junction that takes advantage of the unconventional s x2 y2 =cos kx cos ky 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.",

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AU - Bernevig, B. Andrei

AU - Hu, Jiangping

PY - 2009/8/6

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AB - We propose a trilayer π -junction that takes advantage of the unconventional s x2 y2 =cos kx cos ky 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.

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

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