Diminishing Mott gap by doping electrons through depositing one monolayer thin film of Rb on Ca${}_2$CuO${}_2$Cl${}_2$

Han Li, Zhaohui Wang, Shengtai Fan +3

Understanding the doping evolution from a Mott insulator to a superconductor probably holds the key for resolving the mystery of unconventional superconductivity in copper oxides.…