Superconductivity of Cu/CuOx interface formed by shock-wave pressure

31st International Conference on Equations of State for Matter

Shakhray, D.V.^1 ; Avdonin, V.V.^1 ; Palnichenko, A.V.^2

Institute of Problems of Chemical Physics, Russian Academy of Sciences, Academician Semenov Avenue 1, Chernogolovka, Moscow Region

142432, Russia^1

Institute of Solid State Physics, Russian Academy of Sciences, Institutskaya Street 2, Chernogolovka, Moscow Region

142432, Russia^2

关键词: AC Magnetic susceptibility;    Ac susceptibility;    DC magnetization;    Encapsulated products;    Glassy dynamics;    Interfacial layer;    Shielding currents;    Shock wave treatments;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/774/1/012054/pdf
DOI  :  10.1088/1742-6596/774/1/012054

来源: IOP

【 摘 要 】

A mixture of powdered Cu and CuO has been subjected to shock-wave pressure of 350 kbar with following quenching of the vacuum-encapsulated product to 77 K. The ac magnetic susceptibility measurements of the samples have revealed metastable superconductivity with Tc≈ 19 K, characterized by glassy dynamics of the shielding currents below Tc. Comparison of the ac susceptibility and the DC magnetization measurements infers that the superconductivity arises within the granular interfacial layer formed between metallic Cu and its oxides due to the shock-wave treatment.