Measured is the transverse electrical resistance of YBa2Cu3O7−δ single crystals with different oxygen deficiency values (δ) in the temperature range Tc − 300 K. The experimental data are approximated by an empiric expression accounting for the fluctuation conductivity near Tc and the semiconductor-like resistance regime. Our analysis of the concentration dependences of the fitting parameters, in particular, reveals that the resistance temperature dependence is largely affected by the sample's non-homogeneity. The latter, in turn, causes a Tc anisotropy and variable-range hopping conductivity between different phases. The deduced maximal values of the basal-plane coherence length, ξxy(0), are comparable with those for low-temperature superconductors.
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- Superconducting cuprates
- Transverse resistance
- Electrical resistance measurements
Vovk, R. V., Khadzhai, G. Y., Dobrovolskiy, O. V., Nazyrov, Z. F., & Chroneos, A. (2015). Transverse resistance of YBa2Cu3O7−δ single crystals. Current Applied Physics, 15(5), 617-621. https://doi.org/10.1016/j.cap.2015.02.016