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

MPG-Autoren
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Bernhard,  C.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Holden,  T.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Keimer,  B.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Cardona,  M.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Zitation

Bernhard, C., Holden, T., Humlíček, J., Munzar, D., Golnik, A., Kläser, M., et al. (2002). In-plane polarized collective modes in detwinned YBa2Cu3O6.95 observed by spectral ellipsometry. Solid State Communications, 121(2-3), 93-97.


Zitierlink: https://hdl.handle.net/21.11116/0000-000E-ED07-0
Zusammenfassung
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. (C) 2002 Elsevier Science Ltd. All
rights reserved.