From hidden metal-insulator transition to Planckian-like dissipation by tuning the oxygen content in a nickelate. Groningen Digital Competence Centre (University of Groningen) 6, 72 (2021)ĭataset: From hidden metal-insulator transition to Planckian-like dissipation by tuning the oxygen content in a nickelate Rare-earth nickelates, Metal-insulator transition, Percolation, Planckian dissipation These results could provide experimental support for recent theoretical predictions of disorder in a two-fluid model as a possible origin of Planckian dissipation. It is shown that sufficient oxygenation leads to linear temperature dependence of resistivity in the metallic state, with a scattering rate directly proportional to temperature. ![]() Only upon further oxygenation is the global metallic state (with a change in the resistivity slope) eventually achieved. Increasing oxygen content increases the connectivity of the metallic regions and the metal-insulator transition is first revealed, upon reaching the percolation threshold, by the presence of hysteresis. Heavily oxygen deficient NdNiO3 (NNO) films, which are insulating due to electron localization, contain pristine regions that undergo a hidden metal-insulator transition.
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