Two-Channel Kondo Effects in Al/AlO${}_x$/Sc Planar Tunnel Junctions

Sheng-Shiuan Yeh, Juhn-Jong Lin

We have measured the differential conductances $G(V,T)$ in several Al/AlO${}_x$/Sc planar tunnel junctions between 2 and 35 K. As the temperature decreases to $\sim$ 16 K, the zero…