Normal-state magnetoresistance of Sr2RuO4

摘要: We report measurements of the in-plane and out-of-plane magnetoresistance (MR) single crystals layered perovskite superconductor ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ ${(T}_{c}\ensuremath{\approx}1\mathrm{K}).$ The transverse $c$-axis MR $\ensuremath{\Delta}{\ensuremath{\rho}}_{c}/{\ensuremath{\rho}}_{c}(B)$ $(I\ensuremath{\parallel}c,B\ensuremath{\parallel}ab)$ varies linearly with field at low temperatures consistent behavior expected for a quasi-two-dimensional Fermi surface in intermediate-field regime. $\ensuremath{\Delta}{\ensuremath{\rho}}_{c}/{\ensuremath{\rho}}_{c}(T)$ shows striking temperature dependence which arises from competing effects two separate contributions. At temperatures, $\ensuremath{\Delta}{\ensuremath{\rho}}_{c}/{\ensuremath{\rho}}_{c}$ is large positive due to orbital carriers. high however, dominated by negative term that associated nonmetallic resistivity ${\ensuremath{\rho}}_{c}(T).$ argue contributions $\ensuremath{\Delta}{\ensuremath{\rho}}_{c}/{\ensuremath{\rho}}_{c}(B,T)$ originate conduction channels along $c$ axis competition between metallic responsible unusual Finally, we discuss relevance these findings our current understanding high-${T}_{c}$ cuprates.