论文标题
从mott-到sr $ _2 $ ir $ $ _ {1-x} $ rh $ _ {x} $ o $ $ $ $ _ {4} $的分频器的光学签名。
Optical Signature of a Crossover from Mott- to Slater-type Gap in Sr$_2$Ir$_{1-x}$Rh$_{x}$O$_{4}$
论文作者
论文摘要
通过光谱法，我们提供了证据表明，SR $ _2 $ _2 $ ir $ _ {1-x} $ RH $ _ {x} $ o $ $ $ _ {4} $的绝缘体 - 金属过渡发生在从mott-到Slater-type的交叉。 $ x = 0 $的mott-pap持续到高温，并且在整个Néel温度（$ t_n $）上没有异常。兴奋剂兴奋剂后，它会迅速崩溃，并消失在$ x = 0.055 $左右。值得注意的是，正如莫特 - 差距消失了，出现了另一个差距，它是Slater型的，并且在$ t_n $以下发展。该平移间隙仅部分，并伴随着剩余的自由载体的散射速率降低，与铁砷化合物超导体的母体化合物类似。
With optical spectroscopy we provide evidence that the insulator-metal transition in Sr$_2$Ir$_{1-x}$Rh$_{x}$O$_{4}$ occurs close to a crossover from the Mott- to the Slater-type. The Mott-gap at $x = 0$ persists to high temperature and evolves without an anomaly across the Néel temperature, $T_N$. Upon Rh-doping, it collapses rather rapidly and vanishes around $x = 0.055$. Notably, just as the Mott-gap vanishes yet another gap appears that is of the Slater-type and develops right below $T_N$. This Slater-gap is only partial and is accompanied by a reduced scattering rate of the remaining free carriers, similar as in the parent compounds of the iron arsenide superconductors.
