In-plane paraconductivity in c-oriented epitaxial YBa2Cu3O7−x films above Tc

Fluctuation-induced conductivity of five planar Cu0.5Tl0.5Ba2Ca4−xMgxCu5O14−δ (x=1,2) superconductors

“…However, for the highly c-axis-oriented epitaxial thin films, Oh et al [13] reported the 2D-3D cross-over. According to Pogrebnyakov et al [14] the dominance of 3D fluctuations, or 2D-3D cross-over depended on the range of temperature. For single crys- [15,16].…”

On the Fluctuation Induced Excess Conductivity in Stainless Steel Sheathed MgB2 Tapes

“…High , short coherence length, and low carrier densities impart an excess conductivity due to thermal fluctuation in the superconducting order parameter. There have been numerous studies on excess conductivity and order parameter fluctuations in YBa 2 Cu 3 O 7− (Y-123) [8][9][10][11][12][13][14][15][16][17] [25] systems, but only few reports exist on the fluctuation studies [26][27][28] in MgB 2 , and those are performed in the presence of magnetic field.…”