Details

Autor(en) / Beteiligte

• Golubkov, M. V
• Stepanov, V. A
• Sadakov, A. V
• Usol'tsev, A. S
• Morozov, I. V

Titel

Investigation of Josephson Contacts Pb.sub.0.6In.sub.0.4/KFe.sub.2As.sub.2 and KFe.sub.2As.sub.2/KFe.sub.2As.sub.2 and Order Parameter Symmetry Check

Ist Teil von

• Journal of experimental and theoretical physics, 2023-02, Vol.136 (2), p.155

Ort / Verlag

Springer

Erscheinungsjahr

2023

Quelle

SpringerLink

Beschreibungen/Notizen

• The characteristics of point Josephson contacts Pb.sub.0.6In.sub.0.4/KFe.sub.2As.sub.2 and KFe.sub.2As.sub.2/KFe.sub.2As.sub.2 have been studied. The temperature dependences of characteristic contact voltages V.sub.C(T) and the dependences of the first current step amplitudes in I-V characteristics on the power of 7.6-GHz electromagnetic radiation have been measured. It has been found that V.sub.C(T) curves for all contacts can be described in terms of the SIS*IS contact model (S, I, and S* stand for superconductor, insulator, and superconductor with a lower critical temperature, respectively) for superconductors with the s-symmetry of order parameter. It has been proved that the current step oscillation period as a function of microwave power can be exactly approximated with the resistive model of contact with I.sub.S = I.sub.Csin([phi]). Obtained data are consistent with the normal s-symmetry of order parameter.