Eremets M I, Trojan I A, Medvedev S A, Tse J S, Yao Y
Max Planck Institute für Chemie, Postfach 3060, 55020 Mainz, Germany.
Science. 2008 Mar 14;319(5869):1506-9. doi: 10.1126/science.1153282.
The metallization of hydrogen directly would require pressure in excess of 400 gigapascals (GPa), out of the reach of present experimental techniques. The dense group IVa hydrides attract considerable attention because hydrogen in these compounds is chemically precompressed and a metallic state is expected to be achievable at experimentally accessible pressures. We report the transformation of insulating molecular silane to a metal at 50 GPa, becoming superconducting at a transition temperature of Tc = 17 kelvin at 96 and 120 GPa. The metallic phase has a hexagonal close-packed structure with a high density of atomic hydrogen, creating a three-dimensional conducting network. These experimental findings support the idea of modeling metallic hydrogen with hydrogen-rich alloy.
直接实现氢的金属化需要超过400吉帕斯卡（GPa）的压力，这超出了目前实验技术的能力范围。致密的IVA族氢化物引起了相当大的关注，因为这些化合物中的氢在化学上是预压缩的，并且预计在实验可达到的压力下可以实现金属态。我们报告了绝缘分子硅烷在50 GPa下转变为金属，并在96和120 GPa的转变温度Tc = 17开尔文时成为超导体。金属相具有六方密堆积结构，原子氢密度高，形成三维导电网络。这些实验结果支持了用富氢合金模拟金属氢的想法。
