Recently monolayer jacutingaite (Pt₂HgSe₃), a naturally occurring exfoliable mineral, discovered in Brazil in 2008, has been theoretically predicted as a candidate quantum spin Hall system with a 0.5 eV band gap, while the bulk form is one of only a few known dual-topological insulators that may host different surface states protected by symmetries. In this work, we systematically investigate both structure and electronic evolution of bulk Pt₂HgSe₃ under high pressure up to 96 GPa. The nontrivial topology is theoretically stable, and persists up to the structural phase transition observed in the high-pressure regime. Interestingly, we found that this phase transition is accompanied by the appearance of superconductivity at around 55 GPa and the critical transition temperature T_c increases with applied pressure. Our results demonstrate that Pt₂HgSe₃ with nontrivial topology of electronic states displays a ground state upon compression and raises potentials in application to the next-generation spintronic devices.

最近，单层 jacutingaite (Pt ₂ HgSe ₃ ) 是一种天然存在的可剥落矿物，于 2008 年在巴西发现，理论上被预测为具有 0.5 eV 带隙的候选量子自旋霍尔系统，而块体形式是仅有的几个已知的双拓扑绝缘体可以承载受对称保护的不同表面状态。在这项工作中，我们系统地研究了 Pt ₂ HgSe _{3 的}结构和电子演化在高达 96 GPa 的高压下。非平凡的拓扑结构在理论上是稳定的，并且一直持续到在高压状态下观察到的结构相变。有趣的是，我们发现，这种相变伴随着超导在约55 GPA的外观和临界转变温度Ť _Ç随着施加的压力增大。我们的结果表明，具有非平凡电子态拓扑结构的Pt ₂ HgSe ₃在压缩时显示出基态，并提高了应用于下一代自旋电子器件的潜力。