2019/03/19 by Yueyuan Xia, Bo Yang, Fan Jin +3 · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · Materials Science · Chemistry · #High-pressure geophysics and materials #Physics of Superconductivity and Magnetism #Diamond and Carbon-based Materials Research #Metallic hydrogen #Hydrogen #Superconductivity #Nanowire #Materials science #Carbon nanotube #Condensed matter physics #Nanotube #Hydrogen storage #Metal #Nanotechnology #Phonon #Carbon nanotube quantum dot #Chemistry #Metallurgy #Physics
paper · doi:10.1021/acs.nanolett.9b00258
openalex publication_date 2019/03/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
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.