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Persistent URL http://purl.org/net/epubs/work/33910
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Record Id 33910
Title Anomaly in YBa2Cu4O8 charge distribution below Tc: A zero-field muon spin relaxation study
Abstract Zero-field muon spin-relaxation (µSR) measurements in 63Cu isotope enriched and natural YBa2Cu4O8 powders are presented. The µ+ relaxation rate is characterized by a sizeable enhancement as the temperature is lowered below the superconducting transition temperature Tc. The comparison of the asymmetry decay in the two samples reveals that the µ+ relaxation is driven by nuclear dipole interaction from 300 K down to 4.2 K. It is argued that the increase in the relaxation rate below Tc originates from a change either of the µ+ site or of the orientation of the electric-field gradient at the Cu nuclei, due to a modification in the charge distribution within CuO chains. ©2005 The American Physical Society
Organisation CCLRC , ISIS , ISIS-MuSR
Keywords Physics , ISIS 2005
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Language English (EN)
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Journal Article Phys Rev B 71 (2005): 052507. doi:10.1103/PhysRevB.71.052507 2005