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Tuning the QNL and HER performance by electrons and holes doping
(A) Schematic diagram of electrons/holes doping into Na2CdSn lattice.
(B) Changes of QNL positions, surface DOS values, and Gibbs free energy, when electrons and holes are doped into Na2CdSn lattice.
(C) Projection spectrum on the (010) surface of Na2CdSn doped with 0.5 hole.
(D) Gibbs free energy of Na2CdSn by doping 0 and 0.5 holes.
