Solid Hydrogen under Ultra High Pressure

固体氢是一种电绝缘剂，在压力较低，但它可能会在Mbar地区的压力下显示作用。我们的目标是检测，而不是金属化，通过间接光学测量，但通过更直接的电子电阻测量。首先，我们已经尝试生产超高压，并在生产压力下开发电子和磁性测量的技术。在事实上，我们专门设计了超高压和成功的DAC （金刚石铁砧电池），以制造具有5微米直径的压力表面，宽度为5微米，因此，我们准备好进行固体氢的电气耐药性测量，体积为~ 10毫米D1-8毫米D1cc。2.25亿巴的高压也很成功地生产出来，而且耐药性测量也得到了证明。这是现在最好的，高压力实验的记录。第二，在技术基础上，我们已经成功地进行了金属化搜索的研究。 ... More d在压力下的超导电性，从碱性土壤金属钙、元素的振动组（如硫酸（S）和氧）开始。Fur\， we observed， for the first time， the pr\induced superconductivity of ionic cr\CsI and simple organic cr\of CイD26イイD2IイD24イイD2OイイD22イイD2。在实验过程被固定的情况下，所需的金属化压力值从上一个1.5兆巴到2.5兆巴之间变化。现在，有报道说，固体氢仍然透明，即使在3.4兆巴以下，而且仍然像绝缘子电子一样。我们的理论小组（Miyagi等人）还估计，固体氢的分子分离在压力周围4兆巴的地方含有金属物质。因此，我们需要改变我们的实验方案，并生产更高的压力。但是，目前，我们希望我们能在2和3兆巴之间达到金属氢，压力在1000 ° C至1500 ° C的温度下。现在，我们已经开始对氢进行忏悔和压迫。目前的结果显示了稳定保密的困难，因为扩散进入了环绕金属的过程。有一些与固体氢金属化的不同的东西，但仍然有新的实验技术被开发出来，我们的报告表明，金属氢在未来的成功发现。Less（低）

Solid hydrogen is electrically insulator at low pressure but it is expected to show conductivity under pressure at Mbar region. Our purpose is to detect, the metallization not, by indirect optical measurement, but by more direct, electrical resistance measurement. First of all, we tried to produce ultra-high pressure and to develop the techniques of electrical and magnetic measurement under the produced pressure. In fact, we developed DAC (diamond anvil cell) specially designed for ultra-high pressure and succeeded to make fine electrodes with 5 μm width on the pressure surface of 30 μm diameter and so, we are ready for electrical resistance measurement of solid hydrogen with volume of 〜 10ィイD1-8ィエD1cc. High pressure of 2.25 Mbar was also successfully produced and that the resistance measurement was performed there. This is now the best, record for high pressure experiment. Secondly, on the technical basis established above, we have succeeded in the study of search for metallization an … More d superconductivity under pressure, starting from alkaline earth metal Ca, Vib group of elements such as sulfur (S) and oxygen. Further, we observed, for the first time, the pressure induced superconductivity of ionic crystal CsI and simple organic crystal of CィイD26ィエD2IィイD24ィエD2OィイD22ィエD2. During the experimental process stated above, however, the expected metallization pressure value has changed from previous 1.5 Mbar to 2.5 Mbar. Now, it is reported that, the solid hydrogen is still transparent even under 3.4 Mbar and remains as insulator electrically. Our theoretical group (Miyagi et al.) also estimates that, molecular dissociation of solid hydrogen takes place at pressures at around 4 Mbar where hydrogen is metallic. So, we have to change our experimental program and to produce higher pressure. But, at present, we expect we can reach metallic hydrogen at, pressures between 2 Mbar and 3 Mbar and at temperature of 1000 ℃ 〜 1500 ℃. Now, we started confinement and pressurization of hydrogen. Present results show the difficulty of stable confinement, because of the diffusion into the surrounding metal. There are several difficulties against the metallization of solid hydrogen but still the new experimental techniques are developed and our reports give belief on the successful finding of metallic hydrogen in near future. Less