Protonation induced high-T c phases in iron-based superconductors evidenced by NMR and magnetization measurements
Yi Cui,Gehui Zhang,Hao-Bo Li,Hai Lin,Xiyu Zhu,Hai-Hu Wen,Guoqing Wang,Jinzhao Sun,Ming-Wei Ma,Yuan Li,Dongliang Gong,Tao Xie,Yanhong Gu,Shiliang Li,Huiqian Luo,Pu Yu,Weiqiang Yu +16 more
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TLDR
In this article, the authors reported a novel and generic strategy to achieve nonvolatile electron doping in series of Fe-based superconductors by ionic liquid gating induced protonation at room temperature.Abstract:
Chemical substitution during growth is a well-established method to manipulate electronic states of quantum materials, and leads to rich spectra of phase diagrams in cuprate and iron-based superconductors. Here we report a novel and generic strategy to achieve nonvolatile electron doping in series of (i.e. 11 and 122 structures) Fe-based superconductors by ionic liquid gating induced protonation at room temperature. Accumulation of protons in bulk compounds induces superconductivity in the parent compounds, and enhances the Tc largely in some superconducting ones. Furthermore, the existence of proton in the lattice enables the first proton nuclear magnetic resonance (NMR) study to probe directly superconductivity. Using FeS as a model system, our NMR study reveals an emergent high-Tc phase with no coherence peak which is hard to measure by NMR with other isotopes. This novel electric-fieldinduced proton evolution opens up an avenue for manipulation of competing electronic states (e.g. Mott insulators), and may provide an innovative way for a broad perspective of NMR measurements with greatly enhanced detecting resolution.read more
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Gate-tunable phase transitions in thin flakes of 1T-TaS$_{2}$
TL;DR: In this paper, an ionic field effect transistor (termed an iFET) is described, in which gate-controlled Li ion intercalation modulates the material properties of layered crystals of 1T-TaS2.
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Reversible manipulation of the magnetic state in SrRuO3 through electric-field controlled proton evolution.
Zhuolu Li,Shengchun Shen,Zijun Tian,Kyle Hwangbo,Meng Wang,Yujia Wang,F. Michael Bartram,Liqun He,Yingjie Lyu,Yongqi Dong,Yongqi Dong,Gang Wan,Hao-Bo Li,Nianpeng Lu,Nianpeng Lu,Jiadong Zang,Hua Zhou,Elke Arenholz,Qing He,Luyi Yang,Luyi Yang,Weidong Luo,Pu Yu,Pu Yu +23 more
TL;DR: Electric-field controlled protonation in SrRuO3 is reported, resulting in a large structural expansion and a ferromagnetic-to-paramagnetic phase transition, and a novel protonated compound of HSrRu O3 with paramagnetic metallic as ground state is revealed.
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Manipulate the Electronic and Magnetic States in NiCo2O4 Films through Electric-Field-Induced Protonation at Elevated Temperature
Meng Wang,Xuelei Sui,Yujia Wang,Yung Hsiang Juan,Yingjie Lyu,Huining Peng,Tongtong Huang,Shengchun Shen,Chenguang Guo,Jianbing Zhang,Zhuolu Li,Hao-Bo Li,Nianpeng Lu,Alpha T. N'Diaye,Elke Arenholz,Shuyun Zhou,Qing He,Ying-Hao Chu,Wenhui Duan,Pu Yu,Pu Yu +20 more
TL;DR: This study shows that environmental temperature is an efficient tuning knob to manipulate ILG-induced ionic evolution and induces a novel phase transformation in NiCo2 O4 from ferrimagnetic metallic into antiferromagnetic insulating with protonation at elevated temperatures.
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Low-Voltage Control of (Co/Pt) x Perpendicular Magnetic Anisotropy Heterostructure for Flexible Spintronics.
TL;DR: The low voltage and strain dual control of magnetism on mica substrates enables tunable flexible spintronic devices with an increased degree of manipulation.
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Beyond electrostatic modification: design and discovery of functional oxide phases via ionic-electronic doping
TL;DR: A new field of functional materials and device physics is rising that combines ionic transport with charge carrier modulation to realize emergent physical properties and discovery of metas as discussed by the authors, which is a new research field in functional materials.
References
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Possible high Tc superconductivity in the Ba-La-Cu-O system
TL;DR: In this paper, Ba−La−Cu−O system, with the composition BaxLa5−xCu5O5(3−y) have been prepared in polycrystalline form, and samples with x=1 and 0.75,y>0, annealed below 900°C under reducing conditions, consist of three phases, one of them a perovskite-like mixed-valent copper compound.
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Iron-Based Layered Superconductor La[O1-xFx]FeAs (x = 0.05−0.12) with Tc = 26 K
TL;DR: It is reported that a layered iron-based compound LaOFeAs undergoes superconducting transition under doping with F- ions at the O2- site and exhibits a trapezoid shape dependence on the F- content.
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Superconductivity in the PbO-type structure α-FeSe
F. C. Hsu,J. Y. Luo,Kuo-Wei Yeh,Ta-Kun Chen,T. W. Huang,Phillip M. Wu,Yong-Chi Lee,Yi-Lin Huang,Yan-Yi Chu,Der-Chung Yan,Maw-Kuen Wu +10 more
TL;DR: The observation of superconductivity with zero-resistance transition temperature at 8 K in the PbO-type α-FeSe compound is reported, indicating that this compound has the same, perhaps simpler, planar crystal sublattice as the layered oxypnictides.
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Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2.
TL;DR: The ternary iron arsenide (BaFe) becomes superconducting by hole doping, which was achieved by partial substitution of the barium site with potassium as mentioned in this paper, which was the first superconductivity discovery.
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Superconductivity at 43 K in SmFeAsO1-xFx.
TL;DR: Chen et al. as discussed by the authors reported the discovery of bulk superconductivity in the related compound SmFeAsO1-xF x, which has a ZrCuSiAs-type structure.