Single-layer FeSe films grown on SrTiO3, with the highest superconducting transition temperature (TC) among all the iron-based superconductors, serves as an ideal platform for studying the microscopic mechanisms of high-TCsuperconductivity. The significant role of interfacial coupling has been widely recognized, while the precise nature of theTCenhancement remains open. In this review, we focus on the investigations of the interfacial coupling in FeSe/SrTiO3from the perspective of electron-phonon coupling (EPC). The main content will include an overview of the experimental measurements associated with different theoretical models and arguments about the EPC. Especially, besides the discussions of EPC based on the measurements of electronic states, we will emphasize the analyses based on phonon measurements. A uniform picture about the nature of the EPC and its relation to theTCenhancement in FeSe/SrTiO3has still not achieved, which should be the key for further studies aiming to the in-depth understanding of high-TCsuperconductivity and the discovery of new superconductors with even enhancedTC.

中文翻译：

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FeSe/SrTiO _{3 中的}超导增强：从电子-声子耦合的角度回顾

在所有铁基超导体中，在 SrTiO3 上生长的单层 FeSe 薄膜具有最高的超导转变温度 (TC)，是研究高 TC 超导微观机制的理想平台。界面耦合的重要作用已得到广泛认可，而 TC 增强的确切性质仍然是开放的。在这篇综述中，我们从电子-声子耦合（EPC）的角度重点研究了 FeSe/SrTiO3 中的界面耦合。主要内容将包括与不同理论模型相关的实验测量概述和关于 EPC 的论点。特别是，除了基于电子态测量的 EPC 讨论之外，我们将强调基于声子测量的分析。