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          Institute: MPI für Festkörperforschung     Collection: FKF Publikationen 2004     Display Documents



  history
ID: 192792.0, MPI für Festkörperforschung / FKF Publikationen 2004
Anomalous oxygen-isotope effect on the in-plane far-infrared conductivity of detwinned YBa2Cu316,18O6.9
Authors:Bernhard, C.; Holden, T.; Boris, A. V.; Kovaleva, N. N.; Pimenov, A. V.; Humlíček, J.; Ulrich, C.; Lin, C. T.; Tallon, J. L.
Language:English
Date of Publication (YYYY-MM-DD):2004
Title of Journal:Physical Review B
Volume:69
Issue / Number:5
Sequence Number of Article:052502
Review Status:not specified
Audience:Not Specified
Abstract / Description: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.
External Publication Status:published
Document Type:Article
Communicated by:Michaela Asen-Palmer
Affiliations:MPI für Festkörperforschung
External Affiliations:Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany.
; Masaryk Univ, Brno, Czech Republic.
; Ind Res Lab, Lower Hutt, New Zealand.
Identifiers:ISI:000220001700011 [ID No:1]
ISSN:1098-0121 [ID No:2]
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