Abstract:
The current-voltage characteristics and dynamic conductance spectra of Andreev arrays in nearly optimal GdO1−xFxFeAs superconductors with the critical temperature Tc=46−50 K have been studied. A reproducible fine structure that accompanies large gap features and caused by boson emission during the process of multiple Andreev reflections has been observed. At T=4.2 K, the bosonic mode energy ε0=(12±2) meV has been obtained.
Citation:
S. A. Kuzmichev, T. E. Kuzmicheva, “Observation of bosonic resonances in GdO1−xFxFeAs by intrinsic multiple Andreev reflection effect spectroscopy”, Pis'ma v Zh. Èksper. Teoret. Fiz., 105:10 (2017), 631–636; JETP Letters, 105:10 (2017), 671–676