Topological superconductivity in two-dimensional altermagnetic metals

Bringing magnetic metals into superconducting states represents an important approach for realizing unconventional superconductors and potentially even topological superconductors. Altermagnetism, classified as a third basic collinear magnetic phase, gives rise to intriguing momentum-dependent spin-splitting of the band structure and results in an even number of spin-polarized Fermi surfaces due to the symmetry-enforced zero net magnetization. In this work, we investigate the effect of this new magnetic order on the superconductivity of a two-dimensional metal with $d$-wave altermagnetism and Rashba spin-orbital coupling. Specifically we consider an extended attractive Hubbard interaction and determine the…

• NN
  National Natural Science Foundation of China

  Awards: 11974161, 12174455
• NS
  Natural Science Foundation of Guangdong Province

  Award: 2021B1515020026
• NK
  National Key Research and Development Program of China

  Award: 2022YFA1404103
• SS
  Shenzhen Science and Technology Innovation Program

  Award: KQTD20200820113010023