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Modulation of Metal and Insulator States in 2D Ferromagnetic VS 2 by van der Waals Interaction Engineering
Author(s) -
Guo Yuqiao,
Deng Haitao,
Sun Xu,
Li Xiuling,
Zhao Jiyin,
Wu Junchi,
Chu Wangsheng,
Zhang Sijia,
Pan Haibin,
Zheng Xusheng,
Wu Xiaojun,
Jin Changqing,
Wu Changzheng,
Xie Yi
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201700715
Subject(s) - materials science , van der waals force , ferromagnetism , condensed matter physics , metal , modulation (music) , insulator (electricity) , metal–insulator transition , quantum mechanics , optoelectronics , physics , metallurgy , molecule , acoustics
2D transition‐metal dichalcogenides (TMDCs) are currently the key to the development of nanoelectronics. However, TMDCs are predominantly nonmagnetic, greatly hindering the advancement of their spintronic applications. Here, an experimental realization of intrinsic magnetic ordering in a pristine TMDC lattice is reported, bringing a new class of ferromagnetic semiconductors among TMDCs. Through van der Waals (vdW) interaction engineering of 2D vanadium disulfide (VS 2 ), dual regulation of spin properties and bandgap brings about intrinsic ferromagnetism along with a small bandgap, unravelling the decisive role of vdW gaps in determining the electronic states in 2D VS 2 . An overall control of the electronic states of VS 2 is also demonstrated: bond‐enlarging triggering a metal‐to‐semiconductor electronic transition and bond‐compression inducing metallization in 2D VS 2 . The pristine VS 2 lattice thus provides a new platform for precise manipulation of both charge and spin degrees of freedom in 2D TMDCs availing spintronic applications.