The well-known electrocatalyst iridium dioxide (IrO₂) has recently shown interesting topological and spin transport properties with potential applications as electrodes and spin injector/detector in oxide-based electronic and spintronic devices. So far, no study has been reported on its thermal properties that could disclose important aspects of electron and phonon interactions. Through combined experimental and modeling efforts, here we show rather high thermal conductivity of IrO₂ that is mainly attributed to phonon transport. Analysis indicates that the large lattice contribution results from the strong interatomic bonding and large difference in the atomic mass between iridium and oxygen. Interestingly, it is found that electron-phonon scattering plays a significant role and leads to a remarkable reduction in the lattice thermal conductivity.

众所周知的电催化剂二氧化铱 (IrO ₂ ) 最近显示出有趣的拓扑和自旋输运特性，具有作为电极和自旋注入器/探测器在基于氧化物的电子和自旋电子器件中的潜在应用。到目前为止，还没有关于其热性质的研究报告可以揭示电子和声子相互作用的重要方面。通过结合实验和建模工作，我们在这里展示了 IrO _{2 的}相当高的热导率这主要归因于声子传输。分析表明，较大的晶格贡献是由强大的原子间键合和铱和氧之间原子质量的巨大差异造成的。有趣的是，发现电子-声子散射起着重要作用，并导致晶格热导率显着降低。