Recovery of a high-pressure phase formed under laser-driven compression
Recovery of a high-pressure phase formed under laser-driven compression
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DOI：
10.1103/physrevb.102.024101
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发表时间：
2020-07-06
影响因子：
3.7
通讯作者：
Smith, R. F.
中科院分区：
文献类型：
--
作者：
Gorman, M. G.;McGonegle, D.;Smith, R. F.
恢复在高压下形成的亚稳态结构一直是凝聚态物理领域的一个长期目标。虽然激光驱动压缩被用作在高压下产生新结构的方法，但到目前为止，还没有高压相被淬火到环境条件下。在这里，我们使用原位X射线衍射和恢复方法，成功地淬灭了在激光驱动冲击压缩下形成的高压相。我们表明，从冲击压缩状态裁剪压力释放路径以消除样品层裂，从而消除过热，增加高压的恢复产量。锆晶相从0%到48%。我们的结果对于使用纳秒激光驱动的压缩在极端压力下发生的新的物质相的可消失性具有重要的意义。
The recovery of metastable structures formed at high pressure has been a long-standing goal in the field of condensed matter physics. While laser-driven compression has been used as a method to generate novel structures at high pressure, to date no high-pressure phases have been quenched to ambient conditions. Here we demonstrate, using in situ x-ray diffraction and recovery methods, the successful quench of a high-pressure phase which was formed under laser-driven shock compression. We show that tailoring the pressure release path from a shock-compressed state to eliminate sample spall, and therefore excess heating, increases the recovery yield of the high-pressure. phase of zirconium from 0% to 48%. Our results have important implications for the quenchability of novel phases of matter demonstrated to occur at extreme pressures using nanosecond laser-driven compression.