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Reversible manipulation of the magnetic state in SrRuO3 through electric-field controlled proton evolution.
Nature Communications ( IF 14.7 ) Pub Date : 2020-01-10 , DOI: 10.1038/s41467-019-13999-1
Zhuolu Li 1 , Shengchun Shen 1 , Zijun Tian 2 , Kyle Hwangbo 3 , Meng Wang 1 , Yujia Wang 1 , F Michael Bartram 3 , Liqun He 3 , Yingjie Lyu 1 , Yongqi Dong 4, 5, 6 , Gang Wan 5 , Haobo Li 1 , Nianpeng Lu 1, 7 , Jiadong Zang 8 , Hua Zhou 4 , Elke Arenholz 9 , Qing He 10 , Luyi Yang 1, 3, 11 , Weidong Luo 2, 12 , Pu Yu 1, 11, 13
Affiliation  

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.

中文翻译:


通过电场控制质子演化对 SrRuO3 中的磁性状态进行可逆操纵。



离子取代形成了通过离子-电子-晶格耦合操纵材料的结构相、载流子密度和晶体对称性的重要途径,从而在强相关系统中产生丰富的电子态谱。使用铁磁金属 SrRuO3 作为模型系统,我们展示了通过离子液体门控的电场控制质子演化对结构和电子相变的有效且可逆的控制。质子的插入导致大的结构膨胀和载流子密度增加,从而导致奇异的铁磁到顺磁的相变。重要的是,我们揭示了一种以顺磁性金属为基态的新型质子化化合物 HSrRuO3。我们观察到由于薄膜深度上的质子浓度梯度而导致相变边界处的拓扑霍尔效应。我们设想电场控制的质子化开辟了一条探索质子化材料系统中新型电子态和材料功能的途径。
更新日期:2020-01-10
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