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- W2579129136 abstract "Abstract The carrier concentration and mobility in nanocrystalline Bi2Te3 thin films with controlled strain were investigated through a combination of infrared spectroscopy and first-principles calculations, and the results were compared to Hall measurement data. The thin films were deposited on flexible polyimide substrates using radio frequency magnetron sputtering at a substrate temperature of 200 °C. Various compressive strains were introduced into the thin films by changing the curvature of the flexible substrate prior to deposition. The magnitude of the strain was determined by X-ray diffraction, which found that the strain in the c-axis direction was more greatly influenced by the magnitude of curvature than that in the a,b-axis direction. The average crystallite size remained at ∼30 nm across the entire range of strains tested, but did slightly increase with decreasing strain. The electronic transport properties were estimated by infrared spectroscopy using the Drude model, with the effective mass being determined from the band structure using first-principles calculations based on density functional theory. This combined analysis exhibited a similar decrease in carrier concentration and increase in mobility with decreasing strain as the Hall measurements, though the difference between the results of the two measurement methods became greater as the strain decreased." @default.
- W2579129136 created "2017-01-26" @default.
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- W2579129136 date "2017-04-01" @default.
- W2579129136 modified "2023-09-24" @default.
- W2579129136 title "Combined infrared spectroscopy and first-principles calculation analysis of electronic transport properties in nanocrystalline Bi2Te3 thin films with controlled strain" @default.
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- W2579129136 doi "https://doi.org/10.1016/j.jallcom.2017.01.194" @default.
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