论文标题
压力诱导的bair2Ge7和ba3ir4ge16中超导性的重新出现，带有笼子结构
Pressure-induced reemergence of superconductivity in BaIr2Ge7 and Ba3Ir4Ge16 with cage structures
论文作者
论文摘要
由于其结构柔韧性以及肥沃的物理特性，覆盖物或笼子的化合物引起了持续的兴趣。在这里，我们报告了BAIR2GE7和BA3IR4GE16中超导性的压力诱导的重新出现，这是两个新的笼中的新笼子超导体，具有二维笼子结构的构建块。在抑制环境压力超导（SC-I）状态后，出乎意料地出现了一种新的超导（SC-II）状态，TC分别增加到BAIR2GE7和BA3IR4GE16的最大为4.4 K和4.0 K。结合高压同步加速器X射线衍射和拉曼测量值，我们建议将笼中超导的超导重新出现归因于与笼子收缩链接相关的压力诱导的声子软化。
The clathrate-like or caged compounds have attracted continuing interest due to their structural flexibility as well as fertile physical properties. Here we report a pressure-induced reemergence of superconductivity in BaIr2Ge7 and Ba3Ir4Ge16, two new caged superconductors with two-dimensional building blocks of cage structures. After suppressing the ambient-pressure superconducting (SC-I) state, a new superconducting (SC-II) state emerges unexpectedly, with Tc increased to a maximum of 4.4 K and 4.0 K for BaIr2Ge7 and Ba3Ir4Ge16, respectively. Combined with high-pressure synchrotron x-ray diffraction and Raman measurements, we propose that the reemergence of superconductivity in the caged superconductors can be ascribed to a pressure-induced phonon softening linked to the cage shrink.
