Point-contact spectroscopy of iron-based layered superconductor LaO0.9F0.1−δFeAs
Point-contact spectroscopy of iron-based layered superconductor LaO0.9F0.1−δFeAs
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DOI：
10.1209/0295-5075/83/57004
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发表时间：
2008-03
期刊：
影响因子：
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通讯作者：
L. Shan;Yong-Lei Wang;Xiyu Zhu;G. Mu;L. Fang;C. Ren;H. Wen
中科院分区：
文献类型：
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作者：
L. Shan;Yong-Lei Wang;Xiyu Zhu;G. Mu;L. Fang;C. Ren;H. Wen
我们给出了正常金属与新发现的掺f超导体LaO0.9F0.1−δFeAs （F-LaOFeAs）之间结的点接触光谱数据。观察到一个零偏电导峰，其形状和大小表明f - lafeas表面存在Andreev束缚态，这可能是具有节隙函数的非常规配对对称性的证据。测量得到的最大间隙值Δ0≈3.9±0.7 meV，与最近的比热和下临界场实验结果吻合较好。
We present point-contact spectroscopy data for junctions between a normal metal and the newly discovered F-doped superconductor LaO0.9F0.1−δFeAs (F-LaOFeAs). A zero-bias conductance peak was observed and its shape and magnitude suggest the presence of Andreev bound states at the surface of F-LaOFeAs, which provides a possible evidence of an unconventional pairing symmetry with a nodal gap function. The maximum gap value Δ0≈3.9±0.7 meV was determined from the measured spectra, in good agreement with the recent experiments on specific heat and lower critical field.