Metallic delafossites are fascinating layered materials with exceptionally high electrical conductivity and surface polarity. The high conductivity is produced by the two-dimensional Pd and Pt conductive layers stabilized in a layered oxide framework. In this review, I will discuss the current status of thin-film growth and application prospects of metallic delafossites. Thin-film growth will enable the fabrication of the heterostructures of metallic delafossites and other compounds. In such heterostructures, the surface polarity of metallic delafossites can play a significant role, owing to their layered crystal structure with positively and negatively charged layers. Surface polarity not only influences on the movement of electrons but also induces spin-dependent surface states. Polar surfaces and interfaces can be used for device functionality by making the heterostructures of metallic delafossites and functional materials such as semiconductors and magnets. Quantum and mesoscopic devices are another promising application of metallic delafossites, which exploit the very long mean free path and electron coherence length found in bulk single crystals. For such applications, thin films with exceptional quality are needed, which is a challenge for thin-film growth. The research on metallic delafossite thin films is still in its infancy, and this review can impart knowledge that can lead to innovations on heterostructures with various materials.

金属铜铁矿是迷人的层状材料，具有极高的导电性和表面极性。高导电性是由稳定在层状氧化物框架中的二维 Pd 和 Pt 导电层产生的。在这篇综述中，我将讨论金属铜铁矿薄膜生长的现状和应用前景。薄膜生长将使金属铜铁矿和其他化合物的异质结构的制造成为可能。在这种异质结构中，金属铜铁矿的表面极性可以发挥重要作用，因为它们具有带正电和负电层的层状晶体结构。表面极性不仅会影响电子的运动，还会引起依赖于自旋的表面状态。通过制造金属铜铁矿和功能材料（如半导体和磁铁）的异质结构，极性表面和界面可用于设备功能。量子和介观装置是金属铜铁矿的另一个有前途的应用，它利用了在块状单晶中发现的非常长的平均自由程和电子相干长度。对于此类应用，需要具有卓越品质的薄膜，这对薄膜生长来说是一个挑战。金属铜铁矿薄膜的研究仍处于起步阶段，这篇综述可以传授可以导致各种材料异质结构创新的知识。量子和介观装置是金属铜铁矿的另一个有前途的应用，它利用了在块状单晶中发现的非常长的平均自由程和电子相干长度。对于此类应用，需要具有卓越品质的薄膜，这对薄膜生长来说是一个挑战。金属铜铁矿薄膜的研究仍处于起步阶段，这篇综述可以传授可以导致各种材料异质结构创新的知识。量子和介观装置是金属铜铁矿的另一个有前途的应用，它利用了在块状单晶中发现的非常长的平均自由程和电子相干长度。对于此类应用，需要具有卓越品质的薄膜，这对薄膜生长来说是一个挑战。金属铜铁矿薄膜的研究仍处于起步阶段，这篇综述可以传授可以导致各种材料异质结构创新的知识。