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首页> 外文期刊>Physica, C. Superconductivity and its applications >Theoretical proposal of a method to identify the pairing symmetry of Fe-pnictide superconductors using ac-josephson effect
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Theoretical proposal of a method to identify the pairing symmetry of Fe-pnictide superconductors using ac-josephson effect

机译:一种理论上用交流约瑟夫森效应确定铁氧超导体配对对称性的方法的理论建议

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摘要

We theoretically propose a method to detect ±s-wave state in newly discovered Fe-pnictide superconductors, using ac Josephson current through a single-band superconductor/insulator/±s-wave superconductor (S/I/±S) junction. We show that, because of the Riedel anomaly, the ac Josephson current vanishes at some values of biased voltage across the junction. This phenomenon does not occur without the sign difference of order parameters in the two band superconductor, so that the observation of the vanishing ac Josephson current would be a clear signature of ±s-wave pairing symmetry in Fe-pnictides.
机译:我们从理论上提出了一种方法,该方法使用交流约瑟夫森电流通过单带超导体/绝缘体/±s波超导体(S / I /±S)结,来检测新发现的Fe-肽超导体中的±s波状态。我们表明,由于Riedel异常,交流约瑟夫逊电流在结两端的偏置电压的某些值消失了。如果没有两个带超导体中阶跃参数的符号差异,就不会出现这种现象,因此,消失的交流约瑟夫森电流的观察将清楚地表明铁素体中±s波对对称性。

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