Ferroelectric control of a spin-polarized two-dimensional electron gas
Ferroelectric control of a spin-polarized two-dimensional electron gas
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自旋极化二维电子气的铁电控制
DOI：
10.1103/physrevb.103.214101
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发表时间：
2021
影响因子：
3.7
通讯作者：
Dong Shuai
中科院分区：
文献类型：
--
作者：
Weng Yakui;Niu Wei;Huang Xin;An Ming;Dong Shuai
氧化物界面上的自旋极化二维电子气（2DEG）是一种新兴的物理现象，它对潜在的器件应用具有重要的技术意义。然而，大多数以前的相关研究只集中在自旋极化的二维电子气的创建和表征。为了推动器件的应用，电场对自旋极化二维电子气的控制是重要的一步。这里，基于反铁磁和铁电钙钛矿的模型系统，即，该${\mathrm{YTiO}}_{3}/{\mathrm{PbTiO}_{3}$超晶格被设计用于操纵自旋极化的2DEG。通过切换极化方向，自旋极化的2DEG可以针对对称界面和非对称极性界面两者有效地调谐。
The spin-polarized two-dimensional electron gas (2DEG) at oxide interfaces is an emerging physical phenomenon, which is technologically important for potential device applications. However, most previous relevant studies only focused on the creation and characterization of the spin-polarized 2DEG. To push forward the device applications, the control of a spin-polarized 2DEG by electric field is an important step. Here, a model system based on antiferromagnetic and ferroelectric perovskites, i.e., the ${\mathrm{YTiO}}_{3}/{\mathrm{PbTiO}}_{3}$ superlattice, is designed to manipulate the spin-polarized 2DEG. By switching the direction of polarization, the spin-polarized 2DEG can be effectively tuned for both symmetric interfaces and asymmetric polar interfaces.