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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...

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Detalles Bibliográficos
Autores principales: Lian, Chao-Sheng, Wang, Jian-Tao, Duan, Wenhui, Chen, Changfeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
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
Descripción
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.