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Electronic, Dielectric and Plasmonic Properties of Two-Dimensional Electride Materials X2N (X=Ca, Sr): A First-Principles Study
Abstract Based on first-principles calculations, we systematically study the electronic, dielectric and plasmonic properties of two-dimensional (2D) electride materials X 2 N (X = Ca, Sr). We show that both Ca 2 N and Sr 2 N are stable down to monolayer thickness. For thicknesses larger than 1-monolayer (1-ML), there …