Evidence of strong electron-phonon interaction in superconducting MgB$_2$ from electron tunneling
| dc.creator | D'yachenko, A. I. | |
| dc.creator | Tarenkov, V. Yu. | |
| dc.creator | Abal'oshev, A. V. | |
| dc.creator | Lewandowski, S. J. | |
| dc.date | 2002-01-13 | |
| dc.date.accessioned | 2026-07-07T02:44:06Z | |
| dc.date.available | 2026-07-07T02:44:06Z | |
| dc.description | We report tunneling measurements of the electron-phonon (e-ph) interaction in superconducting MgB$_2$ using the MgB$_2$-I-Nb junctions, where I stands for insulator. The phonon structure in tunneling density of states in MgB$_2$ clearly indicates strong e-ph coupling for the E$_{2g}$ in-plane boron phonons in a narrow range around 60 meV. The Eliashberg spectral function $α^2(ω)F(ω)$ reconstructed from the tunneling data, exhibits significant additional contribution into e-ph interaction from other vibrations such as acoustic ($\sim 38$ meV) and optical ($\sim 90$ meV) bands. Our results are in reasonable agreement with neutron scattering experiments, and also to some data of Raman and infrared spectroscopy. | |
| dc.description | Submitted to PRL | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0201200 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0201200 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/18775 | |
| dc.subject | Superconductivity | |
| dc.title | Evidence of strong electron-phonon interaction in superconducting MgB$_2$ from electron tunneling | |
| dc.type | text |