Phonon-mediated high-T c superconductivity in hole-doped diamond-like crystalline hydrocarbon
- Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS)
- Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS); Univ. of Chinese Academy of Sciences, Beijing (China). School of Physics
- Tsinghua Univ., Beijing (China). Dept. of Physics and State Key Lab. of Low-Dimensional Quantum Physics
- Univ. of Nevada, Las Vegas, NV (United States). Dept. of Physics and High Pressure Science and Engineering Center
We here predict by ab initio calculations phonon-mediated high-T c superconductivity in hole-doped diamond-like cubic crystalline hydrocarbon K4-CH (space group I21/3). This material possesses three key properties: (i) an all-sp3 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.
- Research Organization:
- Board of Regents Nevada System of Higher Education, Las Vegas, NV (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); National Natural Science Foundation of China (NSFC); Chinese Academy of Sciences
- Grant/Contract Number:
- NA0001982; 11274356; 11674364; XDB07000000; 2016YFA0301001
- OSTI ID:
- 1368349
- Journal Information:
- Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Chemistry through cocrystals: pressure-induced polymerization of C 2 H 2 ·C 6 H 6 to an extended crystalline hydrocarbon
|
journal | January 2018 |
Unusual sulfur isotope effect and extremely high critical temperature in H3S superconductor
|
journal | April 2018 |
Similar Records
High T{sub c} in cuprates as a universal property of the electron–phonon system
Electronic structure and two-band superconductivity in unconventional high- Tc cuprates Ba2 CuO3+δ