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Extensive impurity-scattering study on the pairing symmetry of monolayer FeSe films on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>SrTiO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>
Determination of the pairing symmetry in monolayer FeSe films on ${\mathrm{SrTiO}}_{3}$ is a requisite for understanding the high superconducting transition temperature in this system, which has attracted intense theoretical and experimental studies but remains controversial. Here, by introducing several types of point defects in FeSe monolayer films, we conduct a …