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  • Editors' Suggestion
  • Letter
  • Open Access

Zero-field finite-momentum and field-induced superconductivity in altermagnets

Debmalya Chakraborty and Annica M. Black-Schaffer

  • Department of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, Sweden

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Phys. Rev. B 110, L060508 – Published 9 August, 2024

DOI: https://doi.org/10.1103/PhysRevB.110.L060508

Abstract

We explore the possibilities for spin-singlet superconductivity in newly discovered altermagnets. Investigating d-wave altermagnets, we show that finite-momentum superconductivity can easily emerge in altermagnets even though they have no net magnetization, when the superconducting order parameter also has d-wave symmetry with nodes coinciding with the altermagnet nodes. Additionally, we find a rich phase diagram when both altermagnetism and an external magnetic field are considered, including superconductivity appearing at high magnetic fields from a parent zero-field normal state.

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Outline

Information

Phys. Rev. B 110, L060508– Published 9 August, 2024
  • Received 26 September 2023
  • Revised 16 January 2024
  • Accepted 24 July 2024
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