shock-wave压力形成的Cu/CuOx界面的超导电性
Superconductivity of Cu/CuOx interface formed by shock-wave pressure
摘要：
粉末状Cu和CuO的混合物经受350 kbar的冲击波压力，随后将真空封装的产品淬火至77 K。样品的交流磁化率测量揭示了亚稳态超导性，Tc = 19.5 K，其特征在于低于Tc的屏蔽电流的玻璃态动力学。交流磁化率和直流磁化强度测量的比较推断，超导电性出现在金属铜和其氧化物之间形成的颗粒界面层由于冲击波处理。
英文摘要：
A mixture of powdered Cu and CuO has been subjected to a 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 = 19.5 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.
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