Hydrogen Confined in a Single Wall Carbon Nanotube Becomes a Metallic and Superconductive Nanowire under High Pressure.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 30884943.
- Also identified by DOI 10.1021/acs.nanolett.9b00258.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Metallic hydrogen is a long-desired material. However, the pressure needed to metallize hydrogen is difficult to access experimentally. We demonstrated that the high-density of hydrogen confined in a (8,0) single-wall carbon nanotube (SWNT) can be metallized at a relative low pressure of 163.5 GPa, due to the " physical compression" effect of SWNT. Through mimicking experimental measurements of the specific heat of confined hydrogen nanowire, we showed that the electronic specific heat of the hydrogen has a clear jump around 225 K, verifying a superconducting transition at this critical temperature. The superconducting hydrogen can be very well explained by the Eliashberg superconductivity theory for an electron-phonon strong-coupling system. Our simulation results open an avenue for the study of nanohydrogen materials at high pressure.