Modulations of the local pairing interaction near magnetic impurities in d-wave superconductors

Abstract

The spin-fluctuation based pairing mechanism has proven successful in explaining the pairing symmetries due to Fermi surface nesting of both cuprates and iron-based materials. In this work, we study signatures of a spin-fluctuation mediated pairing at the local scale. Specifically, we focus on magnetic impurities and calculate both the local antiferromagnetism and the resulting modulated pairing interaction. The latter gives rise to distinct local enhancements of the superconducting gap in the immediate vicinity of the impurities. Our results show that Coulomb-driven pairing naturally leads to unusual superconducting gap modulations near disorder potentials.

8 pages, 3 figures

References in corpus (8)

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Cited by in corpus (2)

• Effect of disorder on the competition between nematic and superconducting order in FeSe
• First principle prediction of structural distortions in the cuprates and their impact on the electronic structure