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Versatile and Highly Efficient Controls of Reversible Topotactic Metal–Insulator Transitions through Proton Intercalation
Author(s) -
Chen Shanquan,
Zhou Haiping,
Ye Xing,
Chen Zuhuang,
Zhao Jinzhu,
Das Sujit,
Klewe Christoph,
Zhang Lei,
Lupi Eduardo,
Shafer Padraic,
Arenholz Elke,
Jin Dun,
Huang Haoliang,
Lu Yalin,
Li Xiaowen,
Wu Meng,
Ke Shanming,
Xu Hu,
Zeng Xierong,
Huang Chuanwei,
Martin Lane W.,
Chen Lang
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201907072
Subject(s) - brownmillerite , materials science , manganite , perovskite (structure) , ferromagnetism , dopant , oxide , intercalation (chemistry) , hydrogen , chemical physics , inorganic chemistry , nanotechnology , chemical engineering , doping , condensed matter physics , optoelectronics , organic chemistry , metallurgy , chemistry , physics , engineering
The ability to tailor a new crystalline structure and associated functionalities with a variety of stimuli is one of the key issues in material design. Developing synthetic routes to functional materials with partially absorbed nonmetallic elements (i.e., hydrogen and nitrogen) can open up more possibilities for preparing novel families of electronically active oxide compounds. Fast and reversible uptake and release of hydrogen in epitaxial ABO 3 manganite films through an adapted low‐frequency inductively coupled plasma technology is introduced. Compared with traditional dopants of metallic cations, the plasma‐assisted hydrogen implantations not only produce reversibly structural transformations from pristine perovskite (PV) phase to a newly found protonation‐driven brownmillerite one but also regulate remarkably different electronic properties driving the material from a ferromagnetic metal to a weakly ferromagnetic insulator for a range of manganite (La 1− x Sr x MnO 3 ) thin films. Moreover, a reversible perovskite‐brownmillerite‐perovskite transition is achieved at a relatively low temperature ( T ≤ 350 °C), enabling multifunctional modulations for integrated electronic systems. The fast, low‐temperature control of structural and electronic properties by the facile hydrogenation/dehydrogenation treatment substantially widens the space for exploring new possibilities of novel properties in proton‐based multifunctional materials.