Topological p+ip superconductivity in doped graphene-like single-sheet materials BC3
Xi Chen, Yugui Yao, Hong Yao, Fan Yang, Jun Ni
DOI 10.1103/PhysRevB.92.174503 · Physical Review B
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Abstract
We theoretically study exotic superconducting phases in graphene-like single-sheet material BC3 doped to its type-II van Hove singularity whose saddle-point momenta are not time-reversal invariant. From combined renormalization group analysis and random-phase approximation calculations, we show that the dominant superconducting instability induced by weak repulsive interactions is in the time-reversal-invariant p+ip pairing channel because of the interplay among dominant ferromagnetic fluctuations, subleading spin fluctuations at finite momentum, and spin-orbit coupling. Such time-reversal-invariant p+ip superconductivity has nontrivial Z2 topological invariant. Our results show that doped BC3 provides a promising route to realizing a genuine two-dimensional helical p+ip superconductor.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BC3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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