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Signatures of chiral superconductivity in rhombohedral graphene
- westurner 1y ago"Signatures of chiral superconductivity in rhombohedral graphene" (2025) https://www.nature.com/articles/s41586-025-09169-7 https://www.nature.com/articles/s41586-025-09169-7 : > Chiral superconductors are unconventional superconducting states that break time reversal symmetry spontaneously and typically feature Cooper pairing at non-zero angular momentum. Such states may host Majorana fermions and provide an important platform for topological physics research and fault-tolerant quantum computing [1–7]. Despite intensive search and prolonged studies of several candidate systems [8–26], chiral superconductivity has remained elusive so far. Here we report the discovery of robust unconventional superconductivity in rhombohedral tetra- and penta-layer graphene without moiré superlattice effects. [...] We also observed a critical B⊥ of 1.4 Tesla, higher than any graphene superconductivity and indicates a strong-coupling superconductivity close to the BCS-BEC crossover [27]. Our observations establish a pure carbon material for the study of topological superconductivity, with the promise to explore Majorana modes and topological quantum computing.
- westurner 1y agoAre "strange metals" really necessary for the study of topological superconductivity, if comparable effects are now multiply-demonstrated with various forms of graphene? "'Strange metals' point to a whole new way to understand electricity" (2025) https://news.ycombinator.com/item?id=44087916 https://news.ycombinator.com/item?id=44087916