講演情報
[16a-S2_201-11]Observation of non-linear rectification effect originated from the interface of iron-based superconductors/electrodes
〇(M2)Utane Nagata1, Motomi Aoki1, Akito Daido2, Ryo Ohshima1, Shigeru Kasahara3, Yuichi Kasahara4, Yuichiro Ando1, Yuji Matsuda2, Yoichi Yanase2, Masashi Shiraishi1 (1.Dept. of Eng., Kyoto Univ., 2.Dept. of Phys., Kyoto Univ., 3.RIIS, Okayama Univ., 4.Dept. of Phys., Kyushu Univ.)
キーワード：
Superconductor、Iron-based superconductor、Rashba-type spin orbit interaction
Superconducting diode effect (SDE) is a rectification phenomenon of supercurrent. The typical SDE is observed when time-reversal symmetry is broken by a magnetic field with inversion symmetry breaking, and polarity of the SDE depends on a direction of the magnetic field. Recently, a magnetic-field-free SDE induced by thermoelectric effect is reported in a device consisting of an iron-based superconductor (SC) with electrodes. Since inversion symmetry is broken at the interface of SC/electrodes, a field-dependent rectification effect originated from the interface can appear in the platform device of the thermoelectric SDE.
In this study, we investigated a field-dependent component of the SDE in iron-based SCs. We obserbed field-dependent and non-linear rectification effect superimposing in the thermoelectric SDE in the iron-based SCs. Interfacial Rashba effect can be an origin of our findings, which will be discussed in the presentation.
In this study, we investigated a field-dependent component of the SDE in iron-based SCs. We obserbed field-dependent and non-linear rectification effect superimposing in the thermoelectric SDE in the iron-based SCs. Interfacial Rashba effect can be an origin of our findings, which will be discussed in the presentation.