Anomaly in YBa(2)Cu(4)O(8) charge distribution below T(c): A zero-field muon spin relaxation study

作者：Carretta P^*; Keren A; Lord JS; Zucca I; Kazakov SM; Karpinski J

来源：Physical Review B, 2005, 71(5): 052507.

DOI：10.1103/PhysRevB.71.052507

Zero-field muon spin-relaxation (mu SR) measurements in (63)Cu isotope enriched and natural YBa(2)Cu(4)O(8) powders are presented. The mu(+) relaxation rate is characterized by a sizeable enhancement as the temperature is lowered below the superconducting transition temperature T(c). The comparison of the asymmetry decay in the two samples reveals that the mu(+) 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

• 出版日期2005-2