Publication details
Broad-band infrared ellipsometry measurements of the c-axis response of underdoped YBa2Cu3O7-delta: Spectroscopic distinction between the normal-state pseudogap and the superconducting gap
| Authors | |
|---|---|
| Year of publication | 2008 |
| Type | Article in Periodical |
| Magazine / Source | Journal of Physics and Chemistry of Solids |
| MU Faculty or unit | |
| Citation | |
| Field | Solid matter physics and magnetism |
| Keywords | superconductors; infrared spectroscopy; optical properties; superconductivity |
| Description | We present broad-band infrared ellipsometry measurements of the c-axis dielectric response of underdoped YBa2Cu3O7-delta single crystals. Our data provide a clear spectroscopic distinction between the normal-state pseudogap and the superconducting gap. In particular, they establish that different energy scales are underlying the respective redistributions of spectral weight. Furthermore, our data are suggestive of a mutual competition between the two gaps and thus of an extrinsic nature of the pseudogap with respect to superconductivity. |
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