Fe1 .01- xCuxSe中的金属-绝缘体转变
Metal - Insulator transition in Fe1.01-xCuxSe
摘要：
硒化铁，Fe 1.01 Se，是最近发现的超导砷化物族的层状母体化合物，以前已被证明是无磁性的，超导的临界温度为8 K。在这里，我们表明，铜可以取代在Fe 1.01Se的铁网站高达20- 30%的溶解度极限，之后观察到的三维CuFeSe 2结构类型的一阶过渡。只要1.5%的铜就足以抑制超导性，4%的铜就可以驱动系统通过金属-绝缘体转变。一个本地的磁矩的介绍，这最大化附近的12%的掺杂，在15 K附近观察到的自旋玻璃转变。
英文摘要：
Iron Selenide, Fe1.01Se, the layered parent compound of the recently discovered superconducting arsenide family, has previously been shown to be non magnetic and superconducting with a critical temperature of 8 K. Here we show that copper can be substituted at the iron site in Fe1.01Se up to a solubility limit of 20-30 %, after which a first order transition to the three-dimensional CuFeSe2 structure type is observed. As little as 1.5 % percent copper is sufficient to suppress the superconductivity, and 4 % drives the system through a metal-insulator transition. A local magnetic moment is introduced, which maximizes near 12% doping, where a spin-glass transition near 15 K is observed.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
