Project supported by the National Key Basic Research Program of China(Grant Nos.2015CB921000,2016YFA0300301,and 2017YFA0302902);the National Natural Science Foundation of China(Grant Nos.11674374 and 1474338);the Key Research Program of Frontier Sciences,Chinese Academy of Sciences(Grant No.QYZDB-SSW-SLH008);the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant Nos.XDB07020100 and XDB07030200);the Beijing Municipal Science and Technology Project(Grant No.Z161100002116011);the Fonds de la Recherche Scientifique–FNRS and the ARC Grant 13/18-08 for Concerted Research Actions,financed by the French Community of Belgium(Wallonia-Brussels Federation);Jérémy Brisbois acknowledges the support from F.R.S.–FNRS(Research Fellowship);The work of Alejandro V Silhanek is partially supported by PDR T.0106.16 of the F.R.S.–FNRS
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 int...