材料科学
半导体
兴奋剂
磁性
带隙
凝聚态物理
光电子学
多铁性
磁性半导体
石墨烯
纳米技术
电子迁移率
光伏
铁电性
电介质
电气工程
工程类
物理
光伏系统
作者
Zhengyuan Tu,Menghao Wu
标识
DOI:10.1002/aelm.201800960
摘要
Abstract The direct combination of high‐mobility semiconductors and efficient multiferroic memories within the same material is desirable for integration of multifunctional electronics but remains a challenge. Stimulated by recent progress on intercalation of layered materials, first‐principles evidence of 2D room‐temperature multiferroicity in a series of doped metal dichalcogenides is shown, mainly focused on intercalated MoS 2 and Bi 2 Se 3 . The intercalated ions may induce a switchable vertical polarization for high‐density recording as well as electrically tunable magnetism for highly efficient “electric writing + magnetic reading.” Akin to diluted magnetic semiconductors, certain multiferroic regions can be selectively formed via such doping, which can be directly integrated in the high‐mobility semiconductor wafer like n / p doping channels. In particular, other intriguing properties such as topological superconductivity may also be endowed in ferroelectric metal Cu x Bi 2 Se 3 . The bandgap of the intercalated systems can also be tuned via control of the doping density of ions, which may render a spatial‐varying bandgap for efficient light adsorption plus the enhanced exciton separation and open‐circuit voltage for ferroelectric photovoltaics.
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