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arXiv 2102.08652cond-mat.supr-conhep-th
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HTS中局域电子配对的有效磁致伸缩机制

Effective magnetic monopole mechanism for localized electron pairing in HTS

M. C. Diamantini, C. A. Trugenberger, V. M. Vinokur

摘要:

高温超导体空间局域化强耦合电子配对的机制一直是人们争论的热点。在这里,我们提出了一个新的HTS配对机制,这是两个电子的绑定居住在相邻的层状HTS材料的导电平面之间形成的有效磁单极子。位于单极子附近的电子对形成了超导液滴的实空间种子,强耦合是由于拓扑狄拉克量子化条件。配对发生远高于超导转变温度Tc。在冷却时,有效单极子周围的局部电子配对促进了由约瑟夫森链接连接的超导液滴的形成。当强耦合的颗粒形成无限大的团簇时,全局超导性出现,并且全局超导相相干开始。由此产生的Tc估计落在几百到几千开尔文的范围内。我们的发现为定制具有高超导转变温度的材料铺平了道路。

英文摘要:

The mechanism responsible for spatially localized, strong coupling electron pairing characteristic of high-temperature superconductors (HTS) remains elusive and is a subject of hot debate. Here we propose a new HTS pairing mechanism which is the binding of two electrons residing in adjacent conducting planes of layered HTS materials by effective magnetic monopoles forming between these planes. The pairs localized near the monopoles form real-space seeds for superconducting droplets and strong coupling is due to the topological Dirac quantization condition. The pairing occurs well above the superconducting transition temperature Tc. Localized electron pairing around effective monopoles promotes, upon cooling, the formation of superconducting droplets connected by Josephson links. Global superconductivity arises when strongly coupled granules form an infinite cluster, and global superconducting phase coherence sets in. The resulting Tc is estimated to fall in the range from hundred to thousand Kelvins. Our findings pave the way for tailoring materials with elevated superconducting transition temperatures.

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