期刊
NATURE COMMUNICATIONS
卷 11, 期 1, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-019-13999-1
关键词
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资金
- Basic Science Center Program of NSFC [51788104]
- NSFC [51872155, 11474197, U1632272, 11521404, 11904196]
- National Basic Research Program of China [2015CB921700, 2016YFA0301004]
- Beijing Advanced Innovation Center for Future Chip (ICFC)
- Engineering and Physical Sciences Research Council [EP/N016718/1]
- CIFAR Azrieli Global Scholars
- Canada Research Chair
- NSERC
- CFI
- ORF
- UofT startup funds
- DOE Office of Science [DE-AC02-06CH11357]
- DOE Office of Science User Facility [DE-AC02-05CH11231]
- National Natural Science Foundation of China [11974401]
- Hundred Talents Program of Chinese Academy of Science of China
- Strategic Priority Research Program of Chinese Academy of Sciences of China [XDB300000000]
- U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) [DE-SC0020221]
Ionic substitution forms an essential pathway to manipulate the structural phase, carrier density and crystalline symmetry of materials via ion-electron-lattice coupling, leading to a rich spectrum of electronic states in strongly correlated systems. Using the ferromagnetic metal SrRuO3 as a model system, we demonstrate an efficient and reversible control of both structural and electronic phase transformations through the electric-field controlled proton evolution with ionic liquid gating. The insertion of protons results in a large structural expansion and increased carrier density, leading to an exotic ferromagnetic to paramagnetic phase transition. Importantly, we reveal a novel protonated compound of HSrRuO3 with paramagnetic metallic as ground state. We observe a topological Hall effect at the boundary of the phase transition due to the proton concentration gradient across the film-depth. We envision that electric-field controlled protonation opens up a pathway to explore novel electronic states and material functionalities in protonated material systems.
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