Superfluid density dominated junction resistance of bulk polycrystalline YBa_(2)Cu_(3)O_(7−δ) and DyBa_(2)Cu_(3)O_(7−δ) superconductors at low temperature  

作　　者：Doyel Rakshit Sourav Das Ajay Kumar Ghosh 

机构地区：[1]Department of Physics,Jadavpur University,Kolkata 700032,India

出　　处：《Superconductivity》2023年第4期79-83,共5页超导（英文）

摘　　要：Resistances of grain junctions of bulk polycrystalline YBa_(2)Cu_(3)O_(7−δ)(YBCO) and DyBa_(2)Cu_(3)O_(7−δ)(DyBCO) superconductors have been extracted following(i)Ambegaokar‐Baratoff(AB)and(ii)de Gennes(dG)equations.Current–voltage(IV)below the critical temperature(T_(c))has been used to extract transport critical current density(J_(c)).The variations of the junction resistances,(RN)with temperature(T)exhibit that below a critical value of the normalised superfluid density(NSD),junctions become very low resistive and exhibit metallicity.Dependence of this feature of RN on the energy gaps has also been explored.Weak scattering limit is found to be compatible with the maximum of RN(T)as is observed from the corresponding NSD.

关 键 词：Junction resistance Superfluid density 

分 类 号：O44[理学—电磁学]