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arXiv 2101.01701cond-mat.supr-con
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非标准超导体中的迈斯纳效应

Meissner effect in nonstandard superconductors

J. E. Hirsch, F. Marsiglio

摘要:

最近指出,所谓的“超导体”,即在高温和高压下似乎变得超导的富氢材料,表现出与传统和非传统标准I型和II型超导体不同的物理性质[1,2]。在这里,我们考虑了2015年发现的第一种此类材料中的磁场驱逐,即氢化硫[3]。核共振散射实验被解释为在这种材料中发生迈斯纳效应的证明[4,5]。这里我们指出,在假设系统处于热力学平衡的情况下,观察到的效应意味着这种材料中的迈斯纳压力[6]比标准超导体的迈斯纳压力大{ \it很多}。这表明氢化物超导体与已知的标准超导体{ \it if}它们是超导体是质的不同。

英文摘要:

It was recently pointed out that so-called "superhydrides", hydrogen-rich materials that appear to become superconducting at high temperatures and pressures, exhibit physical properties that are different from both conventional and unconventional standard type I and type II superconductors [1,2]. Here we consider magnetic field expulsion in the first material in this class discovered in 2015, sulfur hydride [3]. A nuclear resonant scattering experiment has been interpreted as demonstration that the Meissner effect takes place in this material [4,5]. Here we point out that the observed effect, under the assumption that the system is in thermodynamic equilibrium, implies a Meissner pressure [6] in this material that is {\it much larger} than that of standard superconductors. This suggests that hydride superconductors are qualitatively different from the known standard superconductors {\it if} they are 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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