Direct spectroscopic evidence for phase competition between the pseudogap and superconductivity in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$

Makoto Hashimoto, Elizabeth A. Nowadnick, Rui-Hua. He +16

In the high-temperature ($T_c$) cuprate superconductors, increasing evidence suggests that the pseudogap, existing below the pseudogap temperature $T$*, has a distinct broken ele…