Normal state interlayer conductivity in epitaxial Nd_2–x Ce _x CuO₄ films deposited on SrTiO₃ (110) single crystal substrates

Lateral vortex motion in highly layered electron-doped superconductor Nd2−xCe CuO4

“…According our investigation we have found that in the framework of the model of a natural superlattice [10], [21], [22], [23], [24] in which CuO2 layers represent quantum wells and the buffer layers serve as barriers two complementary processes determine conductivity along the c-axis: incoherent tunneling and thermal activation across the barriers [25] for optimally annealed compounds Nd2-xCexCuO4 with x = 0.12 -0.15. The conductivity in CuO2 layers have a metalliclike behavior and resistivity ρab ~ T 2 in a wide temperature range.…”

“…incoherent tunneling and thermal activation across the barriers [25] for optimally annealed compounds Nd2-xCexCuO4 with x = 0.12 -0.15. The conductivity in CuO2 layers have a metalliclike behavior and resistivity ρab ~ T 2 in a wide temperature range.…”

Resistive transition of hydrogen-rich superconductors

“…phonons). However, for materials where the observed T c does not solely depend on the electron-phonon interaction (in particular, in cuprates [51,53,54], pnictides [75][76][77] and nickelates [78,79]), but instead on the thermodynamic fluctuations [58,[80][81][82][83], the presence of pseudogap [84,85], structural disorder [86][87][88][89], system dimensionality [90][91][92][93][94] or other mechanisms [95][96][97][98] for charge carrier wave function distortions, our equations (11) and (12) might not be a good fitting tool (however, it does not necessarily mean that in some cases these equations will still be a good fitting tool). Based on all the above, alternative R(T, B) models may be developed for other types of materials.…”

“…Here we propose a single equation, which describes the full R(T,B) curve, including the normal state part which is well above the onset of the resistive transition, 𝑇 ≫ 𝑇 𝑐 𝑜𝑛𝑠𝑒𝑡 , and the transition part, 𝑇 ≲ 𝑇 𝑐 𝑜𝑛𝑠𝑒𝑡 . To the best of the authors' knowledge, this sort of equations are not yet known, because existing models describe either the resistive part of R(T,B) curves [51][52][53][54][55][56],…”

“…T onset c and the transition part, T ≲ T onset c . To the best of our knowledge, this equation is not known, because existing models describe either the resistive part of R(T, B) curves [51][52][53][54][55][56] or R(T, B) near the T onset c [41,[57][58][59]. Our model is built on recent results [55,60], revealing that the normal part of R(T, B = 0) curves for a range of NRTS can be fitted to the Bloch-Grüneisen (BG) equation [56]:…”