Tunable superconductivity by electrochemical intercalation in TaS2

N Z Wang; M Z Shi; C Shang; F B Meng; L K Ma; X G Luo; X H Chen

doi:10.1088/1367-2630/aaa8a7

New Journal of Physics (Jan 2018)

Tunable superconductivity by electrochemical intercalation in TaS2

N Z Wang,
M Z Shi,
C Shang,
F B Meng,
L K Ma,
X G Luo,
X H Chen

Affiliations

N Z Wang: Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China
M Z Shi: Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China
C Shang: Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China
F B Meng: Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China
L K Ma: Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China
X G Luo: Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China; Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, People's Republic of China
X H Chen: Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China; Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, People's Republic of China

DOI: https://doi.org/10.1088/1367-2630/aaa8a7
Journal volume & issue: Vol. 20, no. 2
p. 023014

Abstract

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The controllable manipulation of materials properties has always attracted broad interests since there exists the possibility to identify the relationship between different electronic states, and even discover new states. Here we report the electrochemical intercalation of cetyltrimethylammonium (CTA ^+ ) into 2H–TaS _2 . The single layer TaS _2 is intercalated with CTA ^+ cations and the direction of CTA ^+ is approximately perpendicular to the lamellar structure of TaS _2 . With this facile and efficient method, the superconducting transition temperature ( T _c ) of pristine TaS _2 increases from 0.8 K to the maximum 3.7 K, showing a dome-like behavior. The Hall coefficient measurement indicates that the intercalated CTA ^+ cations introduce electrons to this system. The present results demonstrate that electrochemical intercalation method is effective in tuning the materials properties and may pave the way for exploring new superconductors.

Published in New Journal of Physics

ISSN: 1367-2630 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Physics
Website: https://iopscience.iop.org/journal/1367-2630

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