Tunable resistivity exponents in the metallic phase of epitaxial nickelates

Abstract

We report a detailed analysis of the electrical resistivity exponent of thin films of NdNiO3 as a function of epitaxial strain. Strain-free thin-films show a linear dependence of the resistivity vs temperature, consistent with a classical Fermi gas ruled by electron-phonon interactions. In addition, the apparent temperature exponent, n, can be tuned with the epitaxial strain between n= 1 and n= 3. We discuss the critical role played by quenched random disorder in the value of n. Our work shows that the assignment of Fermi/Non-Fermi liquid behaviour based on experimentally obtained resistivity exponents requires an in-depth analysis of the degree of disorder in the material.

arXiv comment13 pages, 12 figures

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• Efficient Probabilistic Computing with Stochastic Perovskite Nickelates
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• Superconductivity in PrNiO2 infinite-layer nickelates
• Superconductivity in freestanding infinite-layer nickelate membranes
• Epitaxial growth of Ruddlesden-Popper neodymium nickelates Nd${}_{n+1}$Ni${}_n$O${}_{3n+1}$ ($n$ = 1-5)
• From hidden metal-insulator transition to Planckian-like dissipation by tuning disorder in a nickelate
• Thin-film aspects of superconducting nickelates
• Phenomenological classification of metals based on resistivity
• Interplay between electron correlations, magnetic state, and structural confinement in LaNiO3 ultrathin films
• Freestanding perovskite and infinite-layer nickelate membranes
• Disentangling transport mechanisms in a correlated oxide by photoinduced charge injection