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- W2953697258 abstract "The metal-to-insulator transition in BaTiO_{3} is investigated using electrostatic doping, which avoids effects from disorder and strain that would accompany chemical doping. SmTiO_{3}/BaTiO_{3}/SrTiO_{3} heterostructures are doped with a constant sheet carrier density of 3×10^{14} cm^{-2} that is introduced via the polar SmTiO_{3}/BaTiO_{3} interface. Below a critical BaTiO_{3} thickness, the structures exhibit metallic behavior with high carrier mobilities at low temperatures, similar to SmTiO_{3}/SrTiO_{3} interfaces. Above this thickness, data indicate that the BaTiO_{3} layer becomes ferroelectric. The BaTiO_{3} lattice parameters increase to a value consistent with a strained, tetragonal unit cell, the structures are insulating below ∼125 K, and the mobility drops by more than an order of magnitude, indicating self-trapping of carriers. The results shed light on the interplay between charge carriers and ferroelectricity." @default.
- W2953697258 created "2019-07-12" @default.
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- W2953697258 date "2016-07-14" @default.
- W2953697258 modified "2023-10-14" @default.
- W2953697258 title "Probing the Metal-Insulator Transition inBaTiO3by Electrostatic Doping" @default.
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- W2953697258 doi "https://doi.org/10.1103/physrevlett.117.037602" @default.
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