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- W2015443955 abstract "Using density functional theory (DFT) we demonstrate that the adsorption of large cations such as potassium or cesium facilitates the epitaxial growth of polar LaAlO$_3$ (LAO) on SrTiO$_3$ (STO). The low ionization potential of K favors efficient electron transfer to the STO conduction band and results in a 2D electron gas which exactly compensates for the diverging potential with increasing layer thickness. For large cations like K or Cs, DFT total energy considerations show that they remain adsorbed on the LAO surface and do not enter substitutionally into LAO. These results suggest a novel scheme for growing clean LAO/STO interface systems, and polar systems in general, by performing the growth process in the presence of large, low ionization potential alkali metal ions." @default.
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- W2015443955 date "2015-03-04" @default.
- W2015443955 modified "2023-09-26" @default.
- W2015443955 title "Large electropositive cations as surfactants for the growth of polar epitaxial films" @default.
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- W2015443955 doi "https://doi.org/10.1103/physrevb.91.125405" @default.
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