Superconductivity in a Magnetic Rashba Semimetal EuAuBi

Abstract

We report the observation of superconductivity with multiple magnetic ordering and Rashba-type spin-orbit coupling in a layered polar semimetal EuAuBi. Magnetic transition is observed at 4 K, followed by a superconducting transition at 2.2 K, which is sensitive to the crystal surface conditions. The upper critical field Hc2 of 9.8 T for the out-of-plane field is three times higher than that for the in-plane field, which can be associated with the two-dimensional structure or the surface state. On the basis of first-principles calculations, it is found that the characteristic Hc2 possibly reflects the anisotropic modification of the Fermi surface by the effective combination of Rashba-type spin splitting and Zeeman spin splitting enhanced by Eu moments.

12 pages, 5 figures

References in corpus (5)

• Quantum Hall effect in a bulk antiferromagnet EuMnBi${}_2$ with magnetically confined two-dimensional Dirac fermions
• Electron Correlation and Pairing States in Superconductors without Inversion Symmetry
• Superconductivity in the Honeycomb-Lattice Pnictide SrPtAs
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Cited by in corpus (1)

• Highly Uniform Magnetic and Electronic Environment in Non-Centrosymmetric Superconductor LaRhGe${}_3$