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Phonon-mediated high-T(c) superconductivity in hole-doped diamond-like crystalline hydrocarbon
We here predict by ab initio calculations phonon-mediated high-T (c) superconductivity in hole-doped diamond-like cubic crystalline hydrocarbon K (4)-CH (space group I2(1)/3). This material possesses three key properties: (i) an all-sp (3) covalent carbon framework that produces high-frequency phono...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5431101/ https://www.ncbi.nlm.nih.gov/pubmed/28469256 http://dx.doi.org/10.1038/s41598-017-01541-6 |
Sumario: | We here predict by ab initio calculations phonon-mediated high-T (c) superconductivity in hole-doped diamond-like cubic crystalline hydrocarbon K (4)-CH (space group I2(1)/3). This material possesses three key properties: (i) an all-sp (3) covalent carbon framework that produces high-frequency phonon modes, (ii) a steep-rising electronic density of states near the top of the valence band, and (iii) a Fermi level that lies in the σ-band, allowing for a strong coupling with the C-C bond-stretching modes. The simultaneous presence of these properties generates remarkably high superconducting transition temperatures above 80 K at an experimentally accessible hole doping level of only a few percent. These results identify a new extraordinary electron-phonon superconductor and pave the way for further exploration of this novel superconducting covalent metal. |
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