Interface-Suppressed Nematicity and Enhanced Superconducting Pairing Strength of FeSe/NdFeO<sub>3</sub> in the Low-Doping Regime.
basic_science · Level V
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- Record sourced from PubMed, PMID 38934420.
- Also identified by DOI 10.1021/acs.nanolett.4c01493.
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Abstract
The discovery of interfacial superconductivity in monolayer FeSe/oxides has spurred intensive research interest. Here we not only extend the FeSe/FeO<sub><i>x</i></sub> superconducting interface to FeSe/NdFeO<sub>3</sub> but also establish robust interface-enhanced superconductivity at a very low doping level. Specifically, well-annealed FeSe/NdFeO<sub>3</sub> exhibits a low doping level of 0.038-0.046 e<sup>-</sup>/Fe with a larger superconducting pairing gap without a nematic gap, indicating an enhancement of the enhanced superconducting pairing strength and suppression of nematicity by the FeSe/FeO<sub><i>x</i></sub> interface compared with those of thick FeSe films. These results improve our understanding of the roles of the oxide interface in the low-electron-doped regime.