Description
We discussed a promising way to create artificial quantum materials with high-temperature spin-triplet superconductivity. These are hybrid spin-singlet SC/half-metallic ferromagnetic manganite nanostructures. The experimental results [1] demonstrate an unconventional superconducting proximity effect in SC/hmF manganite nanostructures. Point-contact spectroscopy of proximity-coupled MgB2/La0.67Sr0.33MnO3 structures reveals a proximity-induced gap three times larger than the coupling energy of ‘parental’ SC MgB2. These and other results indicate that in SC/hmF manganite proximity-coupled structures, a key factor is the local incoherent high-temperature TC ≈ 130 K triplet superconductivity of half-metallic manganites.
The latent spin-triplet superconductivity of half-metallic manganites provides an experimentally accessible platform to overcome the bottleneck of spin-singlet SCs with time-reversal symmetry-breaking counterparts, opening a new framework for high-temperature, triplet superconductivity that supports unique quantum systems and advanced technology applications and remains a subject of further research.
[1] V. N. Krivoruchko, V. Yu. Tarenkov, Phys. Rev. B 75, 214508 (2007); Phys. Rev. B 78, 054522 (2008); Phys. Rev. B 86, 104502 (2012). Low Temp. Phys. 50, 655(2024).
