Coexistence of superconductivity with partially filled stripes in the Hubbard model

The Hubbard model is an iconic model in quantum many-body physics and has been intensely studied, especially since the discovery of high-temperature cuprate superconductors. Combining the complementary capabilities of two computational methods, we found superconductivity in both the electron- and hole-doped regimes of the two-dimensional Hubbard model with next-nearest-neighbor hopping. In the electron-doped regime, superconductivity was weaker and was accompanied by antiferromagnetic Néel correlations at low doping. The strong superconductivity on the hole-doped side coexisted with stripe order, which persisted into the overdoped region with weaker hole-density modulation. These stripe orders varied in…

• NS
  National Science Foundation

  Awards: DMR-2110041, 2110041
• FH
  Flatiron Health
• DF
  Deutsche Forschungsgemeinschaft

  Awards: EXC-2111, 390814868
• NN
  National Natural Science Foundation of China

  Award: 12274290
• MO
  Ministry of Education, India
• NK
  National Key Research and Development Program of China

  Award: 2022YFA1405400
• DO
  Division of Materials Research