We predict the appearance of a persistent spin current in a two-dimensional electron gas formed at the interface of multiferroic oxides with a transverse helical magnetic order. No charge current is generated. This is the result of an effective spin-orbit coupling generated by the topology of the oxide local magnetic moments. The effective coupling and the generated spin current depend linearly on the magnetic spiral helicity which, due to the magneto-electric coupling, is tunable by a transverse electric field offering thus a new mean for the generation of electrically controlled persistent spin currents.
Multiferroic van der Waals heterostructure FeCl$_2$/Sc$_2$CO$_2$: Nonvolatile electrically switchable electronic and spintronic properties
多铁性范德华（vdW）异质结构提供了一个令人兴奋的路线，对新的纳米电子学和自旋电子学器件技术。本文采用第一性原理密度泛函理论和量子输运模拟方法研究了由铁磁FeCl $_2$单层和铁电Sc $_2$ CO $_2$单层组成的多铁性VDW异质结构的电子和输运性质.研究表明，通过电调制Sc $_2$ CO $_2$的铁电极化状态，FeCl $_2$ /Sc $_2$ CO $_2$异质结构可以从半导体可逆地转变为半金属。有趣的是，半金属相表现出III型断裂带对准，这对于隧道场效应晶体管应用是有益的。我们进行了量子输运模拟，基于\emph{proof-of-concept}两端纳米器件，以证明全电控阀效应独特的非易失性铁电开关的异质结构。这些发现揭示了FeCl $_2$ /Sc $_2$ CO $_2$ vdW异质结构作为设计下一代最终紧凑的信息处理、数据存储和自旋电子器件的构建块的潜力。
Thermally Configurable Multi-Order Polar Skyrmions in Multiferroic Oxide Superlattices
State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University（浙江大学材料科学与工程学院硅与先进半导体材料省部共建国家重点实验室）；Zhejiang Key Laboratory of Advanced Solid State Energy Storage Technology and Applications, Taizhou Institute of Zhejiang University（浙江工业大学储能技术与应用浙江省重点实验室台州研究院）；Institute of Fundamental and Transdisciplinary Research, Zhejiang University（浙江大学基础与交叉科学研究院）；School of Engineering, Hangzhou City University（杭州城市学院工学院）；College of Materials Science and Engineering, Zhejiang University of Technology（浙江工业大学材料科学与工程学院）
