Two-dimensional time-reversal-invariant topological superconductivity in a doped quantum spin-Hall insulator
Jing Wang, Yong Xu, Shou-Cheng Zhang
DOI 10.1103/PhysRevB.90.054503 · Physical Review B
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Abstract
Time-reversal-invariant topological superconductors have a full paring gap in the bulk and gapless Majorana states at the edge or on the surface. Here, we theoretically propose topological superconductivity in a doped quantum spin-Hall insulator. We study the pairing symmetry of a doped two-dimensional tin film within a two-orbital model, and find that a novel spin-triplet pairing is favored when the interorbital attractive interaction is stronger than the intraorbital interaction. We propose that a doped tin film is a good candidate for a 2d topological superconductor. Edge channels are studied in a tight-binding model numerically. Finally, we discuss the robustness of topological superconductivity in two-dimensional tin films by comparing to 3d superconductivity in bulk tin.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.72 | Pressure not reported | unknown |
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