铁电层控制的LaInO $_3$ / BaSnO $_3$界面二维电子气
Two-dimensional electron gas at LaInO$_3$/BaSnO$_3$ interfaces controlled by a ferroelectric layer
摘要：
以LaInO $_{3}$ /BaSnO $_3$为例，我们演示了如何通过铁电功能材料有效地控制在这些钙钛矿氧化物之间的界面处形成的二维电子气（2DEG）的密度和分布。指向界面的BaTiO $_3$层中诱导的极化增强了极性不连续性，这又显著增加了2DEG密度和限制，而相反的极化耗尽了2DEG。我们的预测和分析，基于第一性原理计算，可以作为一个指导，设计这样的材料组合，用于电子器件。
英文摘要：
With the example of LaInO$_{3}$/BaSnO$_3$, we demonstrate how both density and distribution of a two-dimensional electron gas (2DEG) formed at the interface between these perovskite oxides, can be efficiently controlled by a ferroelectric functional material. A polarization induced in a BaTiO$_3$ layer pointing toward the interface enhances the polar discontinuity which, in turn, significantly increases the 2DEG density and confinement, while, the opposite polarization depletes the 2DEG. Our predictions and analysis, based on first-principles calculations, can serve as a guide for designing such material combinations to be used in electronic devices.
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