In this progress report, we examine recent efforts towards the introduction of magnetic order into topologically nontrivial systems through magnetic proximity effects, with a particular emphasis on the methods of characterizing magnetization induced at the interface. We focus on the challenges associated with comparing magneto-transport measurements with magnetic scattering and spectroscopy techniques, considering the limitations and potential artifacts associated with topological insulator heterostructures. Taking the ${(\mathrm{Bi},\mathrm{Sb})}_2{(\mathrm{Se},\mathrm{Te})}_3$ family of three-dimensional topological insulators as an example, we discuss the results associated with a wide range of magnetically ordered reservoirs and highlight the wide discrepancies in reported magnetic proximity effect strengths detected using different characterization techniques. Finally, we discuss the outlook of magnetic proximity effects in topological insulator heterostructures as a route towards a higher-temperature quantum anomalous Hall effect.

中文翻译：

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拓扑绝缘体异质结构中的磁邻近效应：实现和表征

在这份进展报告中，我们研究了最近通过磁邻近效应将磁序引入拓扑非平凡系统的努力，特别强调了表征界面感应磁化的方法。考虑到与拓扑绝缘体异质结构相关的局限性和潜在的伪影，我们关注与比较磁传输测量与磁散射和光谱技术相关的挑战。采取${(双,锑)}_2{(硒,特)}_3$以三维拓扑绝缘体系列为例，我们讨论了与各种磁性有序储层相关的结果，并强调了使用不同表征技术检测到的报告磁邻近效应强度之间的巨大差异。最后，我们讨论了拓扑绝缘体异质结构中磁邻近效应的前景，作为实现更高温度量子反常霍尔效应的途径。