Quantum oscillations suggest hidden quantum phase transition in the cuprate superconductor Pr${}_2$CuO${}_{4\pm \delta }$

Nicholas P. Breznay, Ross D. McDonald, Yoshiharu Krockenberger +8

For both electron- and hole-doped cuprates, superconductivity appears in the vicinity of suppressed broken symmetry order, suggesting that quantum criticality plays a vital role in…