论文标题
从隐藏的金属 - 绝缘体过渡到镍的调谐障碍，从
From hidden metal-insulator transition to Planckian-like dissipation by tuning disorder in a nickelate
论文作者
论文摘要
由于电子定位而导致的绝缘胶片，氧气不足的NDNIO $ _3 $（NNO）膜包含经历隐藏金属绝缘体过渡的原始区域。氧气含量的增加会增加金属区域的连通性，并通过滞后时首先揭示了达到渗透阈值后的金属 - 绝缘体转变。只有在进一步的氧合中，最终实现了全球金属状态（电阻率斜率的变化）。结果表明，足够的氧合导致金属状态下电阻率的线性温度依赖性，其散射速率与温度成正比。尽管已知难以确定比例性常数，但实验与关系1/$τ$ = $αk_bt/\ hbar $一致，$α$离统一不远。这些结果可以为在两流体模型中的最新理论预测提供实验支持，这是普朗克耗散的可能起源。
Heavily oxygen deficient NdNiO$_3$ (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/$τ$= $αk_B T/\hbar$, 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.
