Study of the Order Parameter symmetry in overdoped Y1-xCaxBa2Cu3O7-delta by measurement of Andreev reflection, evidence for enhancement of the sub dominant order parameter amplitude in high transparency contacts
| dc.creator | Kohen, A. | |
| dc.creator | Deutscher, G. | |
| dc.date | 2002-07-16 | |
| dc.date.accessioned | 2026-07-07T02:46:17Z | |
| dc.date.available | 2026-07-07T02:46:17Z | |
| dc.description | We have measured the differential Conductance of Au/Y1-xCaxBa2Cu3O7-delta point contacts in the regime where it is dominated by Andreev reflection, which enhances its value at low bias. We find that the characteristics can not be fitted by a pure d-wave Order Parameter (OP). Using the formalism developed by Kashiwaya and Tanaka[1], the best fits are obtained by adding a sub-dominant imaginary OP, whose amplitude appears to depend on the transparency of the contact. At high transparencies it can reach up to 60% of the total amplitude of the OP. for lower transparencies it is substantially smaller. We attribute this enhancement, at high transparencies to a proximity effect between the Au tip and the superconducting electrode | |
| dc.description | 5 pages, 2 figures, MOS 2002 | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0207382 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0207382 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/19613 | |
| dc.subject | Superconductivity | |
| dc.title | Study of the Order Parameter symmetry in overdoped Y1-xCaxBa2Cu3O7-delta by measurement of Andreev reflection, evidence for enhancement of the sub dominant order parameter amplitude in high transparency contacts | |
| dc.type | text |