Liquid-gated interface superconductivity on an atomically flat film.

Nature Materials
J T YeY Iwasa

Abstract

Liquid/solid interfaces are attracting growing interest not only for applications in catalytic activities and energy storage, but also for their new electronic functions in electric double-layer transistors (EDLTs) exemplified by high-performance organic electronics, field-induced electronic phase transitions, as well as superconductivity in SrTiO(3) (ref. 12). Broadening EDLTs to induce superconductivity within other materials is highly demanded for enriching the materials science of superconductors. However, it is severely hampered by inadequate choice of materials and processing techniques. Here we introduce an easy method using ionic liquids as gate dielectrics, mechanical micro-cleavage techniques for surface preparation, and report the observation of field-induced superconductivity showing a transition temperature T(c)=15.2 K on an atomically flat film of layered nitride compound, ZrNCl. The present result reveals that the EDLT is an extremely versatile tool to induce electronic phase transitions by electrostatic charge accumulation and provides new routes in the search for superconductors beyond those synthesized by traditional chemical methods.

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Citations

Jan 25, 2012·Nature Materials·H Y HwangY Tokura
Aug 11, 2011·Proceedings of the National Academy of Sciences of the United States of America·Jianting YeYoshihiro Iwasa
Sep 19, 2012·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·J PereiroI Bozović
Dec 1, 2012·Science·J T YeY Iwasa
Mar 5, 2014·Proceedings of the National Academy of Sciences of the United States of America·Takayoshi KataseHideo Hosono
Jan 19, 2016·ACS Applied Materials & Interfaces·Feng ShaoQing Wan
Feb 9, 2016·Scientific Reports·Yung-Yu ChienWei-Li Lee
Jan 7, 2016·Scientific Reports·Yuuki TakaheiTakashi Kambe
Nov 21, 2015·The Journal of Physical Chemistry Letters·Timothy L AtallahX-Y Zhu
Oct 22, 2015·Journal of the American Chemical Society·Henrry M OsorioQiang Zeng
Apr 4, 2013·Scientific Reports·Eri UesugiYoshihiro Kubozono
Sep 22, 2015·ACS Applied Materials & Interfaces·Yu-Jia ZengChris Van Haesendonck
Jan 27, 2015·Nature Nanotechnology·Yijun YuYuanbo Zhang
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