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  • Letter
  • Open Access

Destruction of surface states of (dzx+idyz)-wave superconductor by surface roughness: Application to Sr2RuO4

Shu-Ichiro Suzuki1,*, Satoshi Ikegaya2, and Alexander A. Golubov1

  • 1MESA+ Institute for Nanotechnology, University of Twente, 7500 AE Enschede, The Netherlands
  • 2Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan

  • *s.suzuki-1@utwente.nl
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Phys. Rev. Research 4, L042020 – Published 1 November, 2022

DOI: https://doi.org/10.1103/PhysRevResearch.4.L042020

Abstract

The fragility of the chiral surface current of the (dzx+idyz)-wave superconductor, a potential candidate for Sr2RuO4 against surface roughness is demonstrated utilizing the quasiclassical Eilenberger theory. Comparing the chiral surface currents of (dzx+idyz)-wave and (px+ipy)-wave pairings, we conclude the chiral current for (dzx+idyz)-wave SC is much more fragile than that for the (px+ipy)-wave one. The difference can be understood in terms of the orbital symmetry of the odd-frequency Cooper pairs arising at the surface. Our results show the (dzx+idyz)-wave scenario can explain the null spontaneous magnetization in Sr2RuO4 experiments.

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Outline

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Phys. Rev. Research 4, L042020– Published 1 November, 2022
  • Received 8 July 2022
  • Revised 27 September 2022
  • Accepted 29 September 2022
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