超导相分离Cs0. 72 Fe 1.57 Se 2的压缩性和压力诱导无序
Compressibility and pressure-induced disorder in superconducting phase-separated Cs0.72Fe1.57Se2
摘要：
用同步辐射研究了超导分相Cs_（0.72）Fe_（1.57）Se_2在19 GPa压力下的衍射响应。在整个压力范围内观察到了Cs_（0.72）Fe_（1.57）Se_2的主相和次相。已发现的主要有序相进行有序-无序过渡的Fe亚晶格至少在P = 11 GPa与相应的动力学小时的顺序。与类似的温度诱导转变相反，第二相没有被抑制，这表明其稳定压力范围高于19 GPa或相应的转变动力学在室温下较慢。与以前报道的压力相关的电阻率和磁化率测量一起，这项工作表明，在AxFe 2-ySe 2（A -碱金属）相的超导电性可能与主相中的Fe空位有序化有关。
英文摘要：
Pressure-dependent diffraction response of the superconducting phase separated Cs0.72Fe1.57Se2 has been studied using synchrotron radiation up to the pressure of 19 GPa. The main and secondary phases of Cs0.72Fe1.57Se2 have been observed in the whole pressure range. The main ordered phase has been found to undergo an order-disorder transition in the Fe-sublattice at least at P = 11 GPa with the corresponding kinetics on the order of hours. Contrary to the analogous temperature induced transition, the secondary phase has not been suppressed suggesting that its stability pressure range is higher than 19 GPa or the corresponding transformation kinetics is slower at room temperature. Together with the previously reported pressure-dependent resistivity and magnetic susceptibility measurements, this work indicates that superconductivity in the AxFe2-ySe2 (A - alkali metals) phases could be related to the Fe-vacancy ordering in the main phase.
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。
