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Title: Phonon-mediated high-T c superconductivity in hole-doped diamond-like crystalline hydrocarbon

Journal Article · · Scientific Reports
 [1];  [2];  [3];  [4]
  1. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS)
  2. 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
  3. Tsinghua Univ., Beijing (China). Dept. of Physics and State Key Lab. of Low-Dimensional Quantum Physics
  4. 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
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

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Cited By (2)

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

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