| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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The 45K Onset Superconductivity and the Suppression of the Nematic Order in FeSe by Electrolyte Gating |
| Wei-Ke Wang1, Yan Liu1,2, Ji-Yong Yang1**, Hai-Feng Du1, Wei Ning1, Lang-Sheng Ling1, Wei Tong1, Zhe Qu1, Zhao-Rong Yang1,3, Ming-Liang Tian1,3,4**, Yu-Heng Zhang1,3 |
1High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031
2University of Science and Technology of China, Hefei 230031
3Hefei Science Center, Chinese Academy of Sciences, Hefei 230031
4Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093
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| Cite this article: |
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Wei-Ke Wang, Yan Liu, Ji-Yong Yang et al 2016 Chin. Phys. Lett. 33 057401 |
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Abstract The electronic doping effect on both the superconductivity and the nematic order in the FeSe nanoflake are investigated by using the electric-double-layer transistor configuration. The superconductivity can be effectively controlled by electronic doping, and the onset superconducting transition temperature $T_{\rm c}$ reaches as high as 45 K at a gate voltage of $V_{\rm g}=4$ V. Meanwhile, the nematic phase is gradually suppressed with the increase of electronic doping (or $V_{\rm g}$). The results provide an effective method with variable charge doping for investigation of the rich physics in the FeSe superconductor.
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Received: 24 December 2015
Published: 31 May 2016
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| PACS: |
74.25.Ha
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(Magnetic properties including vortex structures and related phenomena)
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74.62.Dh
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(Effects of crystal defects, doping and substitution)
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74.25.F-
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(Transport properties)
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72.15.-v
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(Electronic conduction in metals and alloys)
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