Journal
PHYSICAL REVIEW B
Volume 73, Issue 19, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.73.195403
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The atomic-level control achievable in artificially structured oxide superlattices provides a unique opportunity to explore interface phases of matter including high-density two-dimensional (2D) electron gases. Electronic-structure calculations show that the charge distribution introduced by LaTiO3 monolayers in SrTiO3 is strongly modulated by electron-phonon interactions with significant ionic polarization. Anharmonic finite-temperature effects must be included to reproduce experiment. Density functional perturbation theory is used to parametrize a simple model introduced to represent these effects and predict temperature dependencies.
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