2023/12/11 by С. И. Бондаренко, Bondarenko, S. I., A. V. Krevsun +3
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #High voltage insulation and dielectric phenomena #Power Transformer Diagnostics and Insulation #Superconductivity (cond-mat.supr-con) #Vacuum and Plasma Arcs
paper · pdf · doi:10.48550/arxiv.2312.06816
openalex publication_date 2023/12/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The electrical characteristics of a point section of niobium oxide between a massive cathode made of a superconducting indium-tin alloy and a niobium film before the oxide breakdown and the nanocontact that appears after the breakdown of the oxide at room temperature have been studied. The dependences of the point breakdown voltage of the oxide and the resistance of nanocontacts on the method of breakdown and the thickness of the oxide in the range of 15-60 nm have been established. In particular, a minimum value of the breakdown current has been established (about 1 μA), below which breakdown does not occur. The voltage-current characteristic (VCC) of the oxide has a semiconductor character and indicates the dependence of the breakdown voltage of the oxide on its polarity. The VCC of the nanocontact is nonlinear, which is associated with phase transitions in the nanocontact material caused by its heating by the transport current.