Abstract
We present 1/f noise measurements of IrO₂ nanowires from 1.7 to 350 K. Results reveal that the noise magnitude (represented by Hooge parameter γ) increases at low temperatures, indicating low-frequency resistance noise from universal conductance fluctuations. The cause of this noise is determined to be due to oxygen vacancies in the rutile structure of IrO₂. Additionally, the number density of these mobile defects can be calculated from the √T resistance rise caused by the orbital two-channel Kondo effect in the Dirac nodal line metal IrO₂.