Indirect Tunneling Enabled Spontaneous Time-Reversal Symmetry Breaking and Josephson Diode Effect in TiN/Al${}_2$O${}_3$/Hf${}_{0.8}$Zr${}_{0.2}$O${}_2$/Nb tunnel junctions

Shaoqing Ding, Jinyuan Yao, Zhen Bi +6

Josephson diode (JD) effect found in Josephson tunnel junctions (JTJs) has attracted a great deal of attention due to its importance for developing superconducting circuitry based…