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Superconductivity in AgxTaS2 single crystals with stage structure obtained via proton-driven ion introduction

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Title: Superconductivity in AgxTaS2 single crystals with stage structure obtained via proton-driven ion introduction
Authors: Fujioka, Masaya Browse this author
Kubo, Naoki Browse this author
Nagao, Masanori Browse this author
Msiska, Robin Browse this author
Shirakawa, Naoki Browse this author
Demura, Satoshi Browse this author
Sakata, Hideaki Browse this author
Kaiju, Hideo Browse this author →KAKEN DB
Nishii, Junji Browse this author →KAKEN DB
Keywords: Two-dimensional tantalum disulfide
Intercalation
Superconductivity
Solid state electrochemistry
Issue Date: Dec-2018
Publisher: 社団法人 日本セラミックス協会
Journal Title: Journal of the Ceramic Society of Japan
Volume: 126
Issue: 12
Start Page: 963
End Page: 967
Publisher DOI: 10.2109/jcersj2.18148
Abstract: Ag+ ions were intercalated into the transition-metal dichalcogenide TaS2 using the recently developed method of proton-driven ion introduction. Single-crystalline Ag0.58TaS2 with a stage 1 structure and Ag0.21TaS2 with a stage 2 structure were prepared using this method. The stage 2 structure of Ag0.21TaS2 was formed by exploiting the differences in ion diffusion properties among the polytypes of TaS2. Furthermore, our intercalation method can forcibly insert Ag+ ions into interlayers by applying a high voltage at low temperature (100 degrees C), resulting in the formation of thermodynamically metastable phase. Such a synthesis approach oilers a potential route for diversifying intercalation compounds with different stage structures. The first observations of superconductivity in AgxTaS2 were demonstrated in this study. The onset of superconductivity of AgxTaS2 was estimated to be 0.4 and 1.7 K in the samples with x = 0.58 and x = 0.21, respectively. Some anomalies, which were speculatively attributed to charge density wave order, were confirmed in the resistivity measurements of AgxTaS2. The results suggested that the anomalies were closely correlated with the superconducting transition temperature. (C) 2018 The Ceramic Society of Japan. All rights reserved.
Rights: https://creativecommons.org/licenses/by-nd/4.0/deed.ja
Type: article
URI: http://hdl.handle.net/2115/72481
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藤岡 正弥

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