Two-electron photoemission spectroscopy in topological superconductors
Ka Ho Wong, Ameya Patwardhan, Peter Abbamonte, Fahad Mahmood, Dirk K. Morr
DOI 10.1103/PhysRevB.109.094503 · Physical Review B
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Abstract
We demonstrate that the photoelectron counting rate, P(2), measured in two-electron coincidence spectroscopy experiments, provides insight into the nature of topological superconductivity. In particular, we show that the spin dependence of P(2) allows one to detect superconducting spin-triplet correlations that are induced in a topological superconductor even in the absence of an associated triplet superconducting order parameter. This ability to detect spin-triplet correlations allows one to distinguish between two recently proposed scenarios for the microscopic origin of topological superconductivity in FeSe0.45Te0.55. Finally, we show that P(2) exhibits a characteristic intensity maximum that can be employed to detect topological phase transitions.
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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