Effective action approach and Carlson-Goldman mode in d-wave superconductors
| dc.creator | Sharapov, Sergei G. | |
| dc.creator | Beck, Hans | |
| dc.date | 2001-09-03 | |
| dc.date | 2002-01-18 | |
| dc.date.accessioned | 2026-07-07T12:16:35Z | |
| dc.date.available | 2026-07-07T12:16:35Z | |
| dc.description | We theoretically investigate the Carlson-Goldman (CG) mode in two-dimensional clean d-wave superconductors using the effective ``phase only'' action formalism. In conventional s-wave superconductors, it is known that the CG mode is observed as a peak in the structure factor of the pair susceptibility $S(Ω, \mathbf{K})$ only just below the transition temperature T_c and only in dirty systems. On the other hand, our analytical results support the statement by Y.Ohashi and S.Takada, Phys.Rev.B {\bf 62}, 5971 (2000) that in d-wave superconductors the CG mode can exist in clean systems down to the much lower temperatures, $T \approx 0.1 T_c$. We also consider the manifestations of the CG mode in the density-density and current-current correlators and discuss the gauge independence of the obtained results. | |
| dc.description | 23 pages, RevTeX4, 12 EPS figures; final version to appear in PRB | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0109004 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0109004 | |
| dc.identifier | Phys.Rev.B65:134516,2002 | |
| dc.identifier | doi:10.1103/PhysRevB.65.134516 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/211848 | |
| dc.subject | Superconductivity | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Effective action approach and Carlson-Goldman mode in d-wave superconductors | |
| dc.type | text |