Topological superconducting states in monolayer FeSe/SrTiO3
Ningning Hao, Shun-Qing Shen
DOI 10.1103/PhysRevB.92.165104 · Physical Review B
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Abstract
The monolayer FeSe with a thickness of one unit cell grown on a single-crystal SrTiO3 substrate (FeSe/STO) exhibits striking high-temperature superconductivity with transition temperature Tc over 65 K reported by recent experimental measurements. In this work, through analyzing the distinctive electronic structure, and providing systematic classification of the pairing symmetry, we find that both s- and p-wave pairing with odd parity give rise to topological superconducting states in monolayer FeSe, and the exotic properties of s-wave topological superconducting states have close relations with the unique nonsymmorphic lattice structure which induces the orbital-momentum locking. Our results indicate that the monolayer FeSe could be in the topological nontrivial s-wave superconducting states if the relevant effective pairing interactions are dominant in comparison with other candidates.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| FeSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 65 | Pressure not reported | unknown |
| Fe(Te,Se) 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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