Josephson effect in a CeCoIn₅ microbridge

详细信息    查看全文

• 作者：O. Foyevtsov ; F. Porrati ; M. Huth
• 关键词：Heavy fermions ; Josephson junctions ; Microbridges ; Superconducting materials ; Thin films
• 刊名：Physica C
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：480
• 期：Complete
• 页码：6-9
• 全文大小：526 K

文摘

We report DC Josephson effects observed in a microbridge prepared from an individual crystalline growth domain of CeCoIn₅ thin film. Josephson effects were observed by periodic voltage modulations under external magnetic field ¦¤V(B) with the expected periodicity and by the temperature dependence of the Josephson critical current I_c(T). The shape of ¦¤V(B) was found to be asymmetric, as it is expected for microbridges. The dependence I_c(T) follows the Ambegaokar-Baratoff relation, which is unexpected for microbridges. Features in the dynamical resistance curves were attributed to the periodic motion of Abricosov vortices within the microbridge.