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- W2914144940 abstract "We use density functional theory and Monte Carlo lattice simulations to investigate the structure of ZrO$_{2}$ monolayers on Si(001). Recently, we have reported on the experimental growth of amorphous ZrO$_{2}$ monolayers on silicon and their ferroelectric properties, marking the achievement of the thinnest possible ferroelectric oxide [M. Dogan et al. Nano Lett., 18 (1) (2018)]. Here, we first describe the rich landscape of atomic configurations of monocrystalline ZrO$_{2}$ monolayers on Si and determine the local energy minima. Because of the multitude of low-energy configurations we find, we consider the coexistence of finite-sized regions of different configurations. We create a simple nearest-neighbor lattice model with parameters extracted from DFT calculations, and solve it numerically using a cluster Monte Carlo algorithm. Our results suggest that up to room temperature, the ZrO$_{2}$ monolayer consists of small domains of two low-energy configurations with opposite ferroelectric polarization. This explains the observed ferroelectric behavior in the experimental films as a collection of crystalline regions, which are a few nanometers in size, being switched with the application of an external electric field." @default.
- W2914144940 created "2019-02-21" @default.
- W2914144940 creator A5003543257 @default.
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- W2914144940 date "2019-05-22" @default.
- W2914144940 modified "2023-09-24" @default.
- W2914144940 title "Theory of Ferroelectric ZrO<sub>2</sub> Monolayers on Si" @default.
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- W2914144940 doi "https://doi.org/10.1021/acs.jpcc.9b01073" @default.
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