Publication details
In-plane polarized collective modes in detwinned YBa2Cu3O6.95 observed by spectral ellipsometry
| Authors | |
|---|---|
| Year of publication | 2002 |
| Type | Article in Periodical |
| Magazine / Source | Solid state communications |
| MU Faculty or unit | |
| Citation | |
| Field | Solid matter physics and magnetism |
| Keywords | HIGH-TEMPERATURE SUPERCONDUCTORS; SINGLE-DOMAIN YBA2CU3O7; OPTICAL CONDUCTIVITY; ENERGY-GAP; STATE; SPECTROSCOPY; CRYSTAL |
| Description | The in-plane dielectric response of detwinned YBa2Cu3O6.95 has been studied by far-infared ellipsometry. A surprisingly large number of in-plane polarized modes are observed. Some of them correspond to pure phonon modes. Others possess a large electronic contribution which strongly increases in the superconducting state. The free carrier response and the collective modes exhibit a Pronounced a-b anisotropy. We discuss our results in terms of a charge density wave state in the 1-D CuO chains and induced charge density fluctuations within the 2-D CuO2 planes. |
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