Oxide heterostructures allow for detailed studies of 2D electronic transport phenomena. Herein, different facets of magnetotransport in selected spin–orbit-coupled systems are analyzed and characterized by their single-band and multiband behavior, respectively. Experimentally, temperature and magnetic field dependent measurements in the single-band system BaPbO₃/SrTiO₃ reveal strong interplay of weak antilocalization (WAL) and electron–electron interaction (EEI). Within a scheme which treats both, WAL and EEI, on an equal footing a strong contribution of EEI at low temperatures is found which suggests the emergence of a strongly correlated ground state. Furthermore, now considering multiband effects as they appear, e.g., in the model system LaAlO₃/SrTiO₃, theoretical investigations predict a huge impact of filling on the topological Hall effect in systems with intermingled bands. Already weak band coupling produces striking deviations from the well-known Hall conductivity that are explainable in a fully quantum mechanical treatment which builds upon the hybridization of intersecting Hofstadter bands.

中文翻译：

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受自旋轨道耦合影响的功能性氧化物异质结构的磁输运：二维系统的故事

氧化物异质结构允许对二维电子传输现象进行详细研究。在此，对选定的自旋轨道耦合系统中磁输运的不同方面进行了分析，并分别通过它们的单波段和多波段行为进行了表征。_{实验上，单波段系统 BaPbO 3} /SrTiO ₃中的温度和磁场相关测量揭示了弱反定域化 (WAL) 和电子-电子相互作用 (EEI) 的强烈相互作用。在一个同时处理 WAL 和 EEI 的方案中，发现 EEI 在低温下的强大贡献，这表明出现了强相关的基态。此外，现在考虑出现的多波段效应，例如，在模型系统 LaAlO ₃ /SrTiO_{如图 3}所示，理论研究预测填充对具有混合带的系统中的拓扑霍尔效应产生巨大影响。已经很弱的带耦合产生了与众所周知的霍尔电导率的显着偏差，这可以在完全量子力学处理中解释，该处理建立在交叉 Hofstadter 带的杂交之上。