【摘 要】
：
In this work, we discuss the origin of several anomalies present in the point-contact Andreev reflection spectra of (Li1?xFex)OHFeSe, LiTi2O4, and La2?xCexCuO4.
【机 构】
：
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of S
论文部分内容阅读
In this work, we discuss the origin of several anomalies present in the point-contact Andreev reflection spectra of (Li1?xFex)OHFeSe, LiTi2O4, and La2?xCexCuO4. While these features are similar to those stemming from intrinsic superconducting properties, such as Andreev reflection, electron-boson coupling, multigap superconductivity, d-wave and p-wave pairing symmetry, they cannot be accounted for by the modified Blonder–Tinkham–Klapwijk (BTK) model, but require to consider critical current effects arising from the junction geometry. Our results point to the importance of tracking the evolution of the dips and peaks in the differential conductance as a function of the bias voltage, in order to correctly deduce the properties of the superconducting state.
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