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arXiv 1208.0253cond-mat.supr-concond-mat.str-el
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有序共存下的织构超导电性:Ce115s和其它重费米子化合物

Textured Superconductivity in the Presence of a Coexisting Order: Ce115s and Other Heavy-Fermion Compounds

Tuson Park, Xin Lu, Han-Oh Lee, J. D. Thompson

摘要:

在强关联电子系统中,超导性经常出现在另一个对称破缺附近。在重电子超导体中,附近最常见的有序状态是磁性,而所谓的Ce 115重电子化合物对于揭示磁性和超导性之间的新关系特别有指导意义。从这些材料的电阻和体转变到超导性的测量,我们发现,电阻转变出现在一个温度比体转变时,超导性和磁序共存,但这种温度差消失在没有长程磁序。此外,在CeRhIn 5共存的压力-温度区域中,即使四方晶系晶体结构明显保持不变,电阻转变中的新的各向异性也会发展,这意味着一种织构化的超导性。我们认为,这种纹理可能是一个通用的响应共存秩序在这些和其他重费米子超导体。

英文摘要:

Superconductivity in strongly correlated electron systems frequently emerges in proximity to another broken symmetry. In heavy-electron superconductors, the nearby ordered state most commonly is magnetism, and the so-called Ce115 heavy-electron compounds have been particularly instructive for revealing new relationships between magnetism and superconductivity. From measurements of the resistive and bulk transitions to superconductivity in these materials, we find that the resistive transition appears at a temperature considerably higher than the bulk transition when superconductivity and magnetic order coexist, but this temperature difference disappears in the absence of long-range magnetic order. Further, in the pressure-temperature region of coexistence in CeRhIn5, a new anisotropy in the resistive transition develops even though the tetragonal crystal structure apparently remains unchanged, implying a form of textured superconductivity. We suggest that this texture may be a generic response to coexisting order in these and other heavy-fermion superconductors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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