Point-contact spectroscopic studies on normal and superconducting AFe 2 As 2-type iron pnictide single crystals


Point-contact Andreev reflection spectroscopy is applied to investigate the gap structure in iron pnictide single-crystal superconductors of the AFe2As2 (A = Ba, Sr) family (‘Fe-122’). The observed point-contact junction conductance curves, G(V ), can be divided into two categories: one where Andreev reflection is present for both (Ba0.6K0.4)Fe2As2 and Ba… (More)

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