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Journal Article

Anomalous oxygen-isotope effect on the in-plane far-infrared conductivity of detwinned YBa2Cu316,18O6.9

MPS-Authors
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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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Boris,  A. V.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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

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

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Ulrich,  C.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;
Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society;

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Lin,  C. T.
Scientific Facility Crystal Growth (Masahiko Isobe), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Bernhard, C., Holden, T., Boris, A. V., Kovaleva, N. N., Pimenov, A. V., Humlíček, J., et al. (2004). Anomalous oxygen-isotope effect on the in-plane far-infrared conductivity of detwinned YBa2Cu316,18O6.9. Physical Review B, 69(5): 052502.


Cite as: https://hdl.handle.net/21.11116/0000-000E-FFC7-3
Abstract
We observe a large and anomalous oxygen isotope effect on the a-axis
component of the far-infrared electronic response of detwinned
(YBa2Cu3O6.9)-O-16,18. For O-18 a pronounced low-energy electronic mode
(LEM) appears around 240 cm(-1). This a-axis LEM exhibits a clear aging
effect, after 1 y it is shifted to 190 cm(-1). For O-16 we cannot
resolve a corresponding a-axis LEM above 120 cm(-1). We interpret the
LEM in terms of a collective electronic mode that is pinned by
"isotopic defects," i.e., by the residual O-16 in the matrix of O-18.