Mechanically Exfoliated Metallic Delafossite PdCoO₂ Nanomembranes: Quantum Transport and Electrical Evaluation toward Interconnect Applications

However, mesoscopic transport studies are hindered by the limited access to high-quality nanoscale devices. Here, we report single-crystalline PdCoO₂ nanomembranes, enabling exploration of quasi-two-dimensional (quasi-2D) transport.

Shubnikov-de Haas and angle-dependent <i>h/e</i> magnetoresistance oscillations under different magnetic field directions are observed at low temperatures, from which the electron effective mass is extracted. Beyond quantum transport, the electrical performance of PdCoO₂ toward interconnect applications is evaluated. A nearly thickness-independent room-temperature resistivity is observed for flakes down to 40 nm thickness.