Ab initio investigation of hydrogen-based high T c superconductor that is stable under ambient environment
We report an ab initio investigation of a hydrogen-based high- T _c superconductor candidate—crystalized C _4 H _4 in the cubic-gauche ( cg -C _4 H _4 ) structure, with the symmetry of space group I _213 . We find the cg -C _4 H _4 structure to be stable under ambient environment; and the evaluation...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/abce77 |
| Summary: | We report an ab initio investigation of a hydrogen-based high- T _c superconductor candidate—crystalized C _4 H _4 in the cubic-gauche ( cg -C _4 H _4 ) structure, with the symmetry of space group I _213 . We find the cg -C _4 H _4 structure to be stable under ambient environment; and the evaluation of the electron-phonon coupling strength indicates that the heavily doped cg -C _4 H _4 can generate superconductivity with a T _c ∼ 72 K. The high frequency vibrational modes of hydrogen atoms are found to play an important role in the total electron-phonon interaction strength, and the reduction of structural symmetry compared with graphene further enhances the electron–phonon coupling of the carbon framework. Our investigation illustrates a BCS route to realizing the hydrogen-based high T _c superconductivity. |
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| ISSN: | 1367-2630 |