Heavy boron doping in superconducting carbon materials
Yuki Sakai, James R. Chelikowsky, Marvin L. Cohen
DOI 10.1103/PhysRevMaterials.4.054801 · Physical Review Materials
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Abstract
We examine physical properties of heavily boron-doped sp3-hybridized carbon allotropes: cubic diamond, hexagonal diamond, and body centered tetragonal C4. The structural similarity between cubic diamond and hexagonal diamond leads to similar responses to substitutional boron doping. On the other hand, body centered tetragonal C4 exhibits distinct structural and electronic properties because of its characteristic structure. Our study also shows that the superconducting transition temperatures up to 60 K are possible in heavily doped carbon materials despite their various atomistic structures.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CaC6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11.5 | Pressure not reported | unknown |
| CsxRbyC60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 33 | Pressure not reported | unknown |
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