Quasiparticle scattering interference in superconducting iron pnictides

Yan Yang Zhang; Chen Fang; Xiaoting Zhou; Kangjun Seo; Wei Feng Tsai; B. Andrei Bernevig; Jiangping Hu

doi:10.1103/PhysRevB.80.094528

Quasiparticle scattering interference in superconducting iron pnictides

Yan Yang Zhang, Chen Fang, Xiaoting Zhou, Kangjun Seo, Wei Feng Tsai, B. Andrei Bernevig, Jiangping Hu

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

49 Scopus citations

Abstract

Using both two orbital and five orbital models, we investigate the quasiparticle interference (QPI) patterns in the superconducting (SC) state of iron-based superconductors. We compare the results for nonmagnetic and magnetic impurities in sign-changed s -wave cos (kx) cos (ky) and sign-unchanged | cos (kx) cos (ky) | SC states. While the patterns strongly depend on the chosen band structure details, the sensitivity of peaks around (±π,0) and (0,±π) wave vectors on magnetic or nonmagnetic impurities, and on sign-changed or sign-unchanged SC orders is a common feature. Our results suggest that the QPI can provide evidence of the pairing symmetry in the SC states.

Original language	English (US)
Article number	094528
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.80.094528
State	Published - Sep 29 2009

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.80.094528

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title = "Quasiparticle scattering interference in superconducting iron pnictides",

abstract = "Using both two orbital and five orbital models, we investigate the quasiparticle interference (QPI) patterns in the superconducting (SC) state of iron-based superconductors. We compare the results for nonmagnetic and magnetic impurities in sign-changed s -wave cos (kx) cos (ky) and sign-unchanged | cos (kx) cos (ky) | SC states. While the patterns strongly depend on the chosen band structure details, the sensitivity of peaks around (±π,0) and (0,±π) wave vectors on magnetic or nonmagnetic impurities, and on sign-changed or sign-unchanged SC orders is a common feature. Our results suggest that the QPI can provide evidence of the pairing symmetry in the SC states.",

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T1 - Quasiparticle scattering interference in superconducting iron pnictides

AU - Zhang, Yan Yang

AU - Fang, Chen

AU - Zhou, Xiaoting

AU - Seo, Kangjun

AU - Tsai, Wei Feng

AU - Bernevig, B. Andrei

AU - Hu, Jiangping

PY - 2009/9/29

Y1 - 2009/9/29

N2 - Using both two orbital and five orbital models, we investigate the quasiparticle interference (QPI) patterns in the superconducting (SC) state of iron-based superconductors. We compare the results for nonmagnetic and magnetic impurities in sign-changed s -wave cos (kx) cos (ky) and sign-unchanged | cos (kx) cos (ky) | SC states. While the patterns strongly depend on the chosen band structure details, the sensitivity of peaks around (±π,0) and (0,±π) wave vectors on magnetic or nonmagnetic impurities, and on sign-changed or sign-unchanged SC orders is a common feature. Our results suggest that the QPI can provide evidence of the pairing symmetry in the SC states.

AB - Using both two orbital and five orbital models, we investigate the quasiparticle interference (QPI) patterns in the superconducting (SC) state of iron-based superconductors. We compare the results for nonmagnetic and magnetic impurities in sign-changed s -wave cos (kx) cos (ky) and sign-unchanged | cos (kx) cos (ky) | SC states. While the patterns strongly depend on the chosen band structure details, the sensitivity of peaks around (±π,0) and (0,±π) wave vectors on magnetic or nonmagnetic impurities, and on sign-changed or sign-unchanged SC orders is a common feature. Our results suggest that the QPI can provide evidence of the pairing symmetry in the SC states.

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Quasiparticle scattering interference in superconducting iron pnictides

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