High Yield Organic Superconductors via Solution-Phase Alkali Metal Doping at Room Temperature.,Nano Letters

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High Yield Organic Superconductors via Solution-Phase Alkali Metal Doping at Room Temperature.
Nano Letters ( IF 9.6 ) Pub Date : 2019-12-17 , DOI: 10.1021/acs.nanolett.9b04377
Taekyung Yoon ₁ , Jin Young Koo ₁ , Hee Cheul Choi ₁

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Alkali metal doping is an essential process for developing organic superconductors. The conventional vapor-phase alkali metal doping, however, frequently suffers from low efficiency and poor reproducibility mainly due to the inhomogeneous reaction between alkali metal vapor and target organic molecule powder. To overcome this issue, here we developed a facile and highly reproducible solution-phase alkali metal doping (SPD) and successfully applied it to prepare potassium-doped fullerene (K3C60) superconductors. Different from the conventional vapor-phase alkali metal doping, the SPD method resulted in almost perfect diamagnetism with an unprecedented high shielding fraction (∼99.5%) with high reproducibility (>80%). It works well with popular commercially available solvents, like ammonia solution in THF, methylamine solution in THF, and even pure THF at room temperature. We believe that our highly facile and efficient SPD approach will be a great help for the finding of next-generation organic superconductors, especially searching for high-Tc organic superconductors.

中文翻译：

在室温下通过固溶相碱金属掺杂获得高产率的有机超导体。

碱金属掺杂是开发有机超导体的重要过程。然而，主要由于碱金属蒸气与目标有机分子粉末之间的不均匀反应，常规的气相碱金属掺杂经常遭受效率低和可再现性差的困扰。为了克服这个问题，在这里我们开发了一种简便且可重现的溶液相碱金属掺杂（SPD），并成功地将其用于制备钾掺杂富勒烯（K3C60）超导体。与传统的气相碱金属掺杂不同，SPD方法可产生几乎完美的反磁性，具有前所未有的高屏蔽率（〜99.5％）和高再现性（> 80％）。它与流行的市售溶剂（例如THF中的氨溶液，THF中的甲胺溶液，甚至在室温下为纯THF。我们相信，我们高度灵活且高效的SPD方法将为发现下一代有机超导体，特别是寻找高Tc有机超导体提供巨大帮助。

更新日期：2019-12-18

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