Presence of $s$-wave pairing in Josephson junctions made of twisted ultrathin Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$ flakes

Yuying Zhu, Menghan Liao, Qinghua Zhang +14

Since the discovery of high temperature superconductivity in cuprates, Josephson junction based phase-sensitive experiments are believed and used to provide the most convincing evi…