Three-dimensional MgB$_{2}$-type superconductivity in hole-doped diamond
| dc.creator | Boeri, Lilia | |
| dc.creator | Kortus, Jens | |
| dc.creator | Andersen, O. K. | |
| dc.date | 2004-04-19 | |
| dc.date | 2004-11-30 | |
| dc.date.accessioned | 2026-07-07T02:57:43Z | |
| dc.date.available | 2026-07-07T02:57:43Z | |
| dc.description | We substantiate by calculations that the recently discovered superconductivity below 4 K in 3% boron-doped diamond is caused by electron-phonon coupling of the same type as in MgB$_2$, albeit in 3 dimensions. Holes at the top of the zone-centered, degenerate $σ$-bonding valence band couple strongly to the optical bond-stretching modes. The increase from 2 to 3 dimensions reduces the mode-softening crucial for $T_{c}$ reaching 40 K in MgB$_{2}.$ Even if diamond had the same \emph{bare} coupling constant as MgB$_{2},$ which could be achieved with 10% doping, $T_{c}$ would only be 25 K. Superconductivity above 1 K in Si (Ge) requires hole-doping beyond 5% (10%). | |
| dc.description | revised version, accepted by PRL | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0404447 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0404447 | |
| dc.identifier | Phys. Rev. Lett. 93, 237002 (2004) | |
| dc.identifier | doi:10.1103/PhysRevLett.93.237002 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/23777 | |
| dc.subject | Superconductivity | |
| dc.subject | Materials Science | |
| dc.title | Three-dimensional MgB$_{2}$-type superconductivity in hole-doped diamond | |
| dc.type | text |