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2D Diluted Multiferroic Semiconductors upon Intercalation
Author(s) -
Tu Zhengyuan,
Wu Menghao
Publication year - 2019
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201800960
Subject(s) - materials science , ferroelectricity , semiconductor , doping , magnetism , band gap , optoelectronics , multiferroics , magnetic semiconductor , graphene , nanotechnology , electron mobility , photovoltaics , condensed matter physics , dielectric , electrical engineering , physics , engineering , photovoltaic system
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.