Publication details

In-plane polarized collective modes in detwinned YBa2Cu3O6.95 observed by spectral ellipsometry

Authors

BERNHARD C. HOLDEN T. HUMLÍČEK Josef MUNZAR Dominik GOLNIK A.

Year of publication 2002
Type Article in Periodical
Magazine / Source Solid state communications
MU Faculty or unit

Faculty of Science

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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