Screening in (d+s)-wave superconductors: Application to Raman scattering
| dc.creator | Schnyder, Andreas P. | |
| dc.creator | Mudry, Christopher | |
| dc.creator | Manske, Dirk | |
| dc.date | 2006-07-17 | |
| dc.date | 2007-06-01 | |
| dc.date.accessioned | 2026-07-07T08:04:42Z | |
| dc.date.available | 2026-07-07T08:04:42Z | |
| dc.description | We study the polarization-dependent electronic Raman response of untwinned YBa$_2$Cu$_3$O$_{7-δ}$ superconductors employing a tight-binding band structure with anisotropic hopping matrix parameters and a superconducting gap with a mixing of $d$- and s-wave symmetry. Using general arguments we find screening terms in the $B^{\}_{1g}$ scattering channel which are required by gauge invariance. As a result, we obtain a small but measurable softening of the pair-breaking peak, whose position has been attributed for a long time to twice the superconducting gap maximum. Furthermore, we predict superconductivity-induced changes in the phonon line shapes that could provide a way to detect the isotropic s-wave admixture to the superconducting gap. | |
| dc.description | typos corrected, 6 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0607421 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0607421 | |
| dc.identifier | Phys.Rev. B 75, 174525, 2007 | |
| dc.identifier | doi:10.1103/PhysRevB.75.174525 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/130063 | |
| dc.subject | Superconductivity | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Screening in (d+s)-wave superconductors: Application to Raman scattering | |
| dc.type | text |