Ionic-Liquid-Gating Induced Protonation and Superconductivity in FeSe, FeSe0.93S0.07, ZrNCl, 1T-TaS2 and Bi2Se3 *
- North China Electric Power Univ., Beijing (China). School of Mathematics and Physics; Renmin Univ., Beijing (China). Dept. of Physics, and Beijing Key Lab. of Optoelectronic Functional Materials & Micro-nano Devices
- Renmin Univ., Beijing (China). Dept. of Physics, and Beijing Key Lab. of Optoelectronic Functional Materials & Micro-nano Devices
- North China Electric Power Univ., Beijing (China). School of Mathematics and Physics
- Peking Univ., Beijing (China). International Center for Quantum Materials, School of Physics
- Nanjing Univ., Nanjing (China). National Lab. of Solid State Microstructures and Dept. of Physics
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
- Chinese Academy of Sciences, Beijing (China). Beijing National Lab. for Condensed Matter Physics and Institute of Physics
- Peking Univ., Beijing (China). International Center for Quantum Materials, School of Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China)
- Nanjing Univ., Nanjing (China). National Lab. of Solid State Microstructures and Dept. of Physics; Nanjing Univ. (China). Innovative Center for Advanced Microstructures
- Collaborative Innovation Center of Quantum Matter, Beijing (China); Tsinghua Univ., Beijing (China). State Key Lab. of Low Dimensional Quantum Physics and Dept. of Physics
We report protonation in several compounds by an ionic-liquid-gating method, under optimized gating conditions. This leads to single superconducting phases for several compounds. Non-volatility of protons allows post-gating magnetization and transport measurements. The superconducting transition temperature Tc is enhanced to 43.5 K for FeSe0.93S0.07, and 41 K for FeSe after protonation. Superconducting transitions with Tc ~ 15 K for ZrNCl, ~7.2 K for 1T-TaS2, and ~3.8 K for Bi2Se3 are induced after protonation. Electric transport in protonated FeSe0.93S0.07 confirms high-temperature superconductivity. Our 1H nuclear magnetic resonance (NMR) measurements on protonated FeSe1-xSx reveal enhanced spin-lattice relaxation rate 1/1 T1 with increasing x, which is consistent with the LDA calculations that H+ is located in the interstitial sites close to the anions.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1564119
- Journal Information:
- Chinese Physics Letters, Vol. 36, Issue 7; ISSN 0256-307X
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Single crystal growth, transport and scanning tunneling microscopy and spectroscopy of FeSe1-xSx
Phase transition sequence in Pb-free 0.96(K{sub 0.5}Na{sub 0.5}){sub 0.95}Li{sub 0.05}Nb{sub 0.93} Sb{sub 0.07}O{sub 3}−0.04BaZrO{sub 3} ceramic with large piezoelectric response