| Title | Protonation induced high-T-c phases in iron-based superconductors evidenced by NMR and magnetization measurements |
| Authors | Cui, Yi Zhang, Gehui Li, Haobo Lin, Hai Zhu, Xiyu Wen, Hai-Hu Wang, Guoqing Sun, Jinzhao Ma, Mingwei Li, Yuan Gong, Dongliang Xie, Tao Gu, Yanhong Li, Shiliang Luo, Huiqian Yu, Pu Yu, Weiqiang |
| Affiliation | Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China. Tsinghua Univ, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China. Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China. Nanjing Univ, Ctr Superconducting Phys & Mat, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China. Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China. Peking Univ, Int Ctr Quantum Mat, Sch Phys, Beijing 100871, Peoples R China. Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China. Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China. Univ Chinese Acad Sci, Beijing 100049, Peoples R China. Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China. Yu, P (reprint author), Tsinghua Univ, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China. Yu, P (reprint author), Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China. |
| Keywords | Ion liquid gating Protonation NMR Iron-based superconductors NUCLEAR-SPIN RELAXATION INSULATOR FESE |
| Issue Date | 2018 |
| Publisher | SCIENCE BULLETIN |
| Citation | SCIENCE BULLETIN. 2018, 63(1), 11-16. |
| 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 T-c 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. (C) 2017 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved. |
| URI | http://hdl.handle.net/20.500.11897/507042 |
| ISSN | 2095-9273 |
| DOI | 10.1016/j.scib.2017.12.009 |
| Indexed | SCI(E) |
| Appears in Collections: | 量子材料科学中心 |
