Competing topological superconducting phases in FeSe0.45Te0.55
Chang Xu, Ka Ho Wong, Eric Mascot, Dirk K. Morr
DOI 10.1103/PhysRevB.107.214514 · Physical Review B
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Abstract
We demonstrate that recent angle-resolved photoemission spectroscopy experiments provide strong evidence for the existence of two competing topological superconducting phases in FeSe0.45Te0.55. The coupling of their underlying microscopic mechanisms—one based on a three-dimensional topological insulator, one based on two-dimensional superconductivity—stabilizes topological superconductivity over a wide range of parameters, and gives rise to two disjoint topological regions in the phase diagram of FeSe0.45Te0.55. We show that the topological origin of these regions can be identified by considering the form of Majorana edge modes at domain walls.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| FeSe0.45Te0.55 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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