Heavily oxygen-deficient NdNiO₃ (NNO) films, which are insulating due to electron localization, contain pristine regions that undergo a hidden metal-insulator transition. 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. Only upon further oxygenation is the global metallic state (with a change in the resistivity slope) eventually achieved. 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. Despite the known difficulties to establish the proportionality constant, the experiments are consistent with a relationship 1/τ = αk_BT/ℏ, with α not far from unity. These results could provide experimental support for recent theoretical predictions of disorder in a two-fluid model as a possible origin of Planckian dissipation.

由于电子局域化而绝缘的严重缺氧 NdNiO ₃ (NNO) 膜包含经历隐藏金属-绝缘体转变的原始区域。增加氧含量会增加金属区域的连通性，并且在达到渗透阈值时，由于滞后的存在，首先揭示了金属-绝缘体转变。只有进一步氧化才能最终实现整体金属状态（电阻率斜率发生变化）。结果表明，足够的氧化导致金属态电阻率的线性温度依赖性，散射率与温度成正比。尽管建立比例常数存在已知的困难，但实验符合关系 1/ τ =  α k _B T / ℏ，其中α离合一不远。这些结果可以为最近将双流体模型中的无序理论预测为普朗克耗散的可能起源提供实验支持。