Observation of bosonic resonances in GdO1−xFxFeAs by intrinsic multiple Andreev reflection effect spectroscopy


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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.

作者简介

S. Kuzmichev

Moscow State University; Lebedev Physical Institute

Email: kute@sci.lebedev.ru
俄罗斯联邦, Moscow, 119991; Moscow, 119991

T. Kuzmicheva

Lebedev Physical Institute

编辑信件的主要联系方式.
Email: kute@sci.lebedev.ru
俄罗斯联邦, Moscow, 119991

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