Superconducting energy gaps, low temperature specific heat, and quasiparticle spectra of MgB2
| dc.creator | Choi, Hyoung Joon | |
| dc.creator | Roundy, David | |
| dc.creator | Sun, Hong | |
| dc.creator | Cohen, Marvin L. | |
| dc.creator | Louie, Steven G. | |
| dc.date | 2001-11-09 | |
| dc.date.accessioned | 2026-07-07T02:43:27Z | |
| dc.date.available | 2026-07-07T02:43:27Z | |
| dc.description | We report first-principles calculations of the k- and T-dependent superconducting gap Delta(k,T) in MgB2 and its manifestation in various measured quantities. Because the Fermi surface has disconnected sheets with different electron-phonon coupling strengths, our calculations show that near T=0, the values of Delta(k) cluster into two groups: large values (about 6.5 to 7.5 meV) on the strongly coupled sheets and small values (about 1 to 3 meV) on the weakly coupled sheets. The calculated gap, quasiparticle density of states, and specific heat and their temperature dependences are in agreement with the recent measurements which conclude that MgB2 is a multiple gap superconductor. In fact, theory predicts four prominent values for the gap at low T. | |
| dc.description | 13 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0111183 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0111183 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/18505 | |
| dc.subject | Superconductivity | |
| dc.title | Superconducting energy gaps, low temperature specific heat, and quasiparticle spectra of MgB2 | |
| dc.type | text |