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首页> 外文期刊>Physica, C. Superconductivity and its applications >Zero bias conductance peaks in high-T-c superconductors: clues and ambiguities of two mutually excluding models
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Zero bias conductance peaks in high-T-c superconductors: clues and ambiguities of two mutually excluding models

机译：高T-c超导体的零偏置电导峰值：两个互斥模型的线索和歧义

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The origin of the zero bias conductance peak (ZBCP) observed in the tunneling characteristics of different high-T-c based junctions, is analyzed in the framework of the Anderson-Applebaum theory for Kondo type scattering from magnetic impurities at the barrier or in terms of midgap states induced by proximity effect at the surface of a d(x2-y2) wave superconductor. The two models mutually exclude each other since they describe a normal state or a superconducting state effect, respectively. We show that the appearance of the anomaly above or below the junction T-c, is the main indication that enable us to distinguish between the two cases. In addition to this, in the most controversial situations, the simultaneous presence at low temperatures of dips on both sides of the central structure as well as of conductance maxima at the expected values of the main high-T-c superconductor(HTS) energy gap, can be considered as indications of d-wave superconductivity. The case of ZBCP's that for decreasing temperatures merge in conductance minima, is also discussed. (C) 1998 Elsevier Science B.V. All rights reserved. [References: 34]
机译：在基于高Tc的不同结的隧穿特性中观察到的零偏置电导峰（ZBCP）的起源是在Anderson-Applebaum理论的框架内进行分析的，用于从势垒处的磁性杂质或中间能隙进行近藤型散射ad（x2-y2）波超导体表面的邻近效应所引起的电子态。这两个模型相互排斥，因为它们分别描述了正常状态或超导状态效应。我们表明，在T-c交界处上方或下方出现异常是使我们能够区分这两种情况的主要指示。除此之外，在最具争议的情况下，在低温下同时存在中心结构两侧的倾角以及在主要高Tc超导体（HTS）能隙的预期值处的电导最大值是可能的。被认为是d波超导的指示。还讨论了ZBCP的情况，该情况用于降低温度并以电导最小值合并。 （C）1998 Elsevier Science B.V.保留所有权利。 [参考：34]

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