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About the Pressure-Induced Superconducting State of Europium Metal at Low Temperatures
Physica C: Superconductivity and its Applications ( IF 1.7 ) Pub Date : 2020-12-10 , DOI: 10.1016/j.physc.2020.1353805
J.E. Hirsch

In Physical Review Letters 102, 197002 (2009), it was reported that the element Eu becomes superconducting in the pressure and temperature range [84-142GPa], [1.8-2.75K]. The claim was largely based on ac susceptibility measurements. Here I point out that recently reported ac susceptibility measurements on a hydride compound under pressure that appears to become superconducting near room temperature (Nature 586, 373 (2020)) cast serious doubt on the validity of the results for Eu. It is argued that the experiments on Eu have to be repeated to either validate or rule out the claim that it is a superconducting element.



中文翻译:

关于低温下Metal金属的压力诱导超导状态

在Physical Review Letters 102,197002(2009)中,据报道,Eu元素在压力和温度范围[84-142GPa],[1.8-2.75K]时变得超导。该索赔主要基于对磁化率的测量。在这里,我指出最近报道的一种氢化物化合物在室温下似乎变得超导的压力下的磁化率测量结果(Nature 586,373(2020))对Eu的结果的有效性提出了严重怀疑。有人认为,必须对Eu进行重复实验,以证实或排除rule是超导元素的说法。

更新日期:2020-12-10
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