Superconductivity in an Inorganic Electride 12CaO·7Al2O3:e-

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• 作者：Masashi Miyakawa ; Sung Wng Kim ; Masahiro Hirano ; Yoshimitsu Kohama ; Hitoshi Kawaji ; Tooru Atake ; Hiroki Ikegami ; Kimitoshi Kono ; Hideo Hosono
• 刊名：Journal of the American Chemical Society
• 出版年：2007
• 出版时间：June 13, 2007
• 年：2007
• 卷：129
• 期：23
• 页码：7270 - 7271
• 全文大小：154K
• 年卷期：v.129,no.23(June 13, 2007)
• ISSN：1520-5126

文摘

An inorganic electride, 12CaO·7Al₂O₃:e^-, synthesized by exclusively replacing oxygen ions in the sub-nanometer-sized cages of 12CaO·7Al₂O₃ crystal with electrons exhibits a superconducting transition at a temperature (T_c) of ~0.4 K. T_c varies in the range of 0.14-0.4 K with the concentration of anionic electrons, which are primarily distributed over crystallographic spaces without occupying any particular framework ions. The precursor of electride is composed of representative metal oxides, which are electrical insulators. Thus, the exotic crystal structure of electrides provides an insight for a material platform to realize a new superconductor.