Conventional proximity effect in bilayers of superconducting underdoped $La_{1.88}Sr_{0.12}CuO_4$ islands coated with non superconducting overdoped $La_{1.65}Sr_{0.35}CuO_4$
| dc.creator | Koren, G. | |
| dc.creator | Millo, O. | |
| dc.date | 2009-04-13 | |
| dc.date.accessioned | 2026-07-07T13:03:23Z | |
| dc.date.available | 2026-07-07T13:03:23Z | |
| dc.description | Following a recent study by our group in which a large $T_c$ enhancement was reported in bilayers of the non-superconducting $La_{1.65}Sr_{0.35}CuO_4$ and superconducting $La_{1.88}Sr_{0.12}CuO_4$ films [Phys. Rev. Lett. \textbf{101}, 057005 (2008)], we checked if a similar effect occurs when superconducting $La_{1.88}Sr_{0.12}CuO_4$ islands are coated with a continuous layer of the non superconducting $La_{1.65}Sr_{0.35}CuO_4$. We found that no such phenomenon is observed. The bare superconducting islands film behaves as an insulator where transport occurs via hopping or tunneling between islands, but exhibits a weak signature of localized superconductivity at $\sim$18 K. When over coated with a $La_{1.65}Sr_{0.35}CuO_4$ film, it becomes superconducting with a $T_c$ onset of 16.6 K, which is less than that of a thick $La_{1.88}Sr_{0.12}CuO_4$ film (25.7 K). We therefore conclude that the lower $T_c$ in the bilayer is due to a conventional proximity effect. | |
| dc.description | 4 figures | |
| dc.identifier | https://arxiv.org/abs/0904.1928 | |
| dc.identifier | http://arxiv.org/abs/0904.1928 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/226785 | |
| dc.subject | Superconductivity | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Conventional proximity effect in bilayers of superconducting underdoped $La_{1.88}Sr_{0.12}CuO_4$ islands coated with non superconducting overdoped $La_{1.65}Sr_{0.35}CuO_4$ | |
| dc.type | text |