Impacts of substrate conditions and post-annealing on monolayer iron-based superconductors
Guanyang He, Yu Li, Yuxuan Lei, Xingyue Wang, Minghu Pan, Jian Wang
DOI 10.1103/PhysRevMaterials.8.014802 · Physical Review Materials
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Abstract
High-temperature superconductivity in monolayer FeSe/Fe(Te, Se) grown on SrTiO3 (STO) substrates is closely related to the interface effects from STO. Using in situ low-temperature scanning tunneling microscopy/spectroscopy, we study the surface flatness and reconstructions of STO from different pre-treatment methods, and the influence of STO reconstructions on the interfacial superconductivity. Besides, the impacts from postgrowth annealing conditions on the morphology and superconducting properties of monolayer FeSe/Fe(Te, Se) are investigated. These results pave the way for the growth of high-temperature interface superconductors in a detailed level, and provide useful references for better interfacial engineering to foster superconductivity.
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. | — | 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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