Informace o publikaci
Evidence for Two Separate Energy Gaps in Underdoped High-Temperature Cuprate Superconductors from Broadband Infrared Ellipsometry
| Název česky | Dvě oddělené energiové mezery v poddopovaných vysokoteplotních kuprátových supravodičích pozorované infračervenou elipsometrií |
|---|---|
| Autoři | |
| Rok publikování | 2008 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | Physical Review Letters |
| Fakulta / Pracoviště MU | |
| Citace | |
| Obor | Fyzika pevných látek a magnetismus |
| Klíčová slova | high-temperature superconductivity; cuprates; superconducting gap; pseudogap; c-axis conductivity; infrared ellipsometry |
| Popis | We present broadband infrared ellipsometry measurements of the c-axis conductivity of underdoped RBa2Cu3O7-delta (R=Y, Nd, and La) single crystals. Our data show that separate energy scales are underlying the redistributions of spectral weight due to the normal state pseudogap and the superconducting gap. Furthermore, they provide evidence that these gaps do not share the same electronic states and do not merge on the overdoped side. Accordingly, our data are suggestive of a two gap scenario with a pseudogap that is likely extrinsic with respect to superconductivity. |
| Související projekty: |