Anisotropic superconductivity at KTaO3 (111) interfaces.

Journal Article (Journal Article)

A two-dimensional, anisotropic superconductivity was recently found at the KTaO3 (111) interfaces. The nature of the anisotropic superconducting transition remains a subject of debate. To investigate the origins of the observed behavior, we grew epitaxial KTaO3 (111)-based heterostructures. We show that the superconductivity is robust against the in-plane magnetic field and violates the Pauli limit. We also show that the Cooper pairs are more resilient when the bias is along [11[Formula: see text]] (I ∥ [11[Formula: see text]]) and the magnetic field is along [1[Formula: see text]0] (B ∥ [1[Formula: see text]0]). We discuss the anisotropic nature of superconductivity in the context of electronic structure, orbital character, and spin texture at the KTaO3 (111) interfaces. The results point to future opportunities to enhance superconducting transition temperatures and critical fields in crystalline, two-dimensional superconductors with strong spin-orbit coupling.

Full Text

Duke Authors

Cited Authors

  • Arnault, EG; Al-Tawhid, AH; Salmani-Rezaie, S; Muller, DA; Kumah, DP; Bahramy, MS; Finkelstein, G; Ahadi, K

Published Date

  • February 2023

Published In

Volume / Issue

  • 9 / 7

Start / End Page

  • eadf1414 -

PubMed ID

  • 36791191

Pubmed Central ID

  • PMC9931206

Electronic International Standard Serial Number (EISSN)

  • 2375-2548

International Standard Serial Number (ISSN)

  • 2375-2548

Digital Object Identifier (DOI)

  • 10.1126/sciadv.adf1414


  • eng