Subterahertz Momentum Drag and Violation of Matthiessen’s Rule in an Ultraclean Ferromagnetic SrRuO3 Metallic Thin Film
Subterahertz Momentum Drag and Violation of Matthiessen’s Rule in an Ultraclean Ferromagnetic SrRuO3 Metallic Thin Film
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超净铁磁 SrRuO3 金属薄膜中的亚太赫兹动量阻力和违反马蒂森规则
DOI：
10.1103/physrevlett.125.217401
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发表时间：
2020
影响因子：
8.6
通讯作者：
Schlom, D. G.
中科院分区：
文献类型：
--
作者：
Wang, Youcheng;Bossé, G.;Nair, H. P.;Schreiber, N. J.;Ruf, J. P.;Cheng, B.;Adamo, C.;Shai, D. E.;Lubashevsky, Y.;Schlom, D. G.
，具有约160 K居里温度的铁磁体，表现出a依赖的直流电阻率低于。然而，以前在红外和太赫兹范围内的光学研究表明，低温下的非德鲁德动力学，这似乎与费米液体的预测相矛盾。在这项工作中，我们测量的低频太赫兹范围内的响应薄膜的剩余电阻率比，。在温度低于30 K时，我们发现一个尖锐的零频模，其宽度比零频模窄，同时发现一个更宽的零频洛伦兹模，其散射至少大一个数量级。这两个功能的温度依赖性与费米液体与更广泛的功能明确显示ascaling一致。在30 K以上，有一个交叉到一个单一的德鲁德峰，我们认为这是由强带间电子-电子散射所描述的制度。这样的两个渠道德鲁德运输揭示了违反Matthiessen的规则和极端敏感性的报告，在金属双金属酸盐的无序。
, a ferromagnet with an approximately 160 K Curie temperature, exhibits a-dependent dc resistivity below. Nevertheless, previous optical studies in the infrared and terahertz range show non-Drude dynamics at low temperatures, which seem to contradict Fermi-liquid predictions. In this work, we measure the low-frequency THz range response of thin films with residual resistivity ratios,. At temperatures below 30 K, we find both a sharp zero frequency mode which has a width narrower thanas well as a broader zero frequency Lorentzian that has at least an order of magnitude larger scattering. Both features have temperature dependences consistent with a Fermi liquid with the wider feature explicitly showing ascaling. Above 30 K, there is a crossover to a regime described by a single Drude peak that we believe arises from strong interband electron-electron scattering. Such two channel Drude transport sheds light on reports of the violation of Matthiessen’s rule and extreme sensitivity to disorder in metallic ruthenates.