Exponential Temperature Dependence of Penetration Depth in MgB_2
| dc.creator | Manzano, F. | |
| dc.creator | Carrington, A. | |
| dc.date | 2001-06-08 | |
| dc.date.accessioned | 2026-07-07T02:41:42Z | |
| dc.date.available | 2026-07-07T02:41:42Z | |
| dc.description | The temperature dependence of the London penetration depth, $λ(T)$, was measured in polycrystalline MgB$_2$ samples by a high-resolution, radio frequency technique. A clear exponential temperature dependence of $λ(T)$ was observed at low temperature, indicating s-wave pairing. A fit to the data gives an effective energy gap $Δ$ of $2.8\pm0.4$ meV ($2Δ/k_BT_c=1.7\pm0.2$), which is significantly smaller than the standard BCS weak coupling value of 3.5. This may be explained either by an anisotropic gap or the influence of low frequency phonon modes. | |
| dc.description | 4 pages - EPS figures included | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0106166 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0106166 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/17848 | |
| dc.subject | Superconductivity | |
| dc.title | Exponential Temperature Dependence of Penetration Depth in MgB_2 | |
| dc.type | text |