Persistent Josephson tunneling between Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$ flakes twisted by 45${}^{\circ }$ across the superconducting dome

Yuying Zhu, Heng Wang, Zechao Wang +5

There is a heated debate on the Josephson effect in twisted Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$ flakes. Recent experimental results suggest the presence of either anomalously isotropic p…