Saturation of resistivity and Kohler's rule in Ni-doped La$_{1.85}$Sr$_{0.15}$CuO$_{4}$ cuprate

A. Malinowski; V. L. Bezusyy; P. Nowicki

doi:10.1103/PhysRevB.95.014521

paper

Saturation of resistivity and Kohler's rule in Ni-doped La $_{1.85}$ Sr $_{0.15}$ CuO $_{4}$ cuprate

arXiv:1701.02568 · doi:10.1103/PhysRevB.95.014521

Abstract

We present the results of electrical transport measurements of La $_{1.85}$ Sr $_{0.15}$ Cu $_{1 - y}$ Ni $_{y}$ O $_{4}$ thin single-crystal films at magnetic fields up to 9 T. Adding Ni impurity with strong Coulomb scattering potential to slightly underdoped cuprate makes the signs of resistivity saturation at $ρ_{s a t}$ visible in the measurement temperature window up to 350 K. Employing the parallel-resistor formalism reveals that $ρ_{s a t}$ is consistent with classical Ioffe-Regel-Mott limit and changes with carrier concentration $n$ as $ρ_{s a t} \propto 1/ n$ . Thermopower measurements show that Ni tends to localize mobile carriers, decreasing their effective concentration as $n ≅ 0.15 - y$ . The classical unmodified Kohler's rule is fulfilled for magnetoresistance in the nonsuperconducting part of the phase diagram when applied to the ideal branch in the parallel-resistor model.

6 pages, 4 figures

Saturation of resistivity and Kohler's rule in Ni-doped La $_{1.85}$ Sr $_{0.15}$ CuO $_{4}$ cuprate

Abstract

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Saturation of resistivity and Kohler's rule in Ni-doped La1.85​Sr0.15​CuO4​ cuprate

Abstract

References in corpus (3)

Cited by in corpus (2)

Saturation of resistivity and Kohler's rule in Ni-doped La $_{1.85}$ Sr $_{0.15}$ CuO $_{4}$ cuprate