Department of Physics, Universität Basel, Klingelbergstr. 82, 4056, Basel, Switzerland.
Max-Planck Institut of Microstructure Physics, Weinberg 2, 06120, Halle, Germany.
Sci Rep. 2017 Jul 28;7(1):6825. doi: 10.1038/s41598-017-07145-4.
We investigate the possibility of achieving high-temperature superconductivity in hydrides under pressure by inducing metallization of otherwise insulating phases through doping, a path previously used to render standard semiconductors superconducting at ambient pressure. Following this idea, we study HO, one of the most abundant and well-studied substances, we identify nitrogen as the most likely and promising substitution/dopant. We show that for realistic levels of doping of a few percent, the phase X of ice becomes superconducting with a critical temperature of about 60 K at 150 GPa. In view of the vast number of hydrides that are strongly covalent bonded, but that remain insulating up to rather large pressures, our results open a series of new possibilities in the quest for novel high-temperature superconductors.
我们通过掺杂来研究在高压下通过诱导原本绝缘的相金属化从而实现氢化物高温超导的可能性，这是一种以前用于使标准半导体在常压下超导的方法。基于这一想法，我们研究了 HO，它是最丰富和研究最充分的物质之一，我们确定氮是最有可能和有前途的替代/掺杂剂。我们表明，对于实际的掺杂水平为百分之几，冰的 X 相在 150GPa 时成为超导相，临界温度约为 60K。鉴于大量的氢化物具有很强的共价键，但在相当大的压力下仍然是绝缘的，我们的结果为寻找新型高温超导体开辟了一系列新的可能性。
