Anomaly in YBa2Cu4O8 charge distribution below Tc: a zero-field muSR study

P. Carretta, A. Keren, J. S. Lord +3

Zero-field $\mu$SR measurements in ${}^{63}$Cu isotope enriched and natural YBa${}_2$Cu${}_4$O${}_8$ powders are presented. The temperature dependence of the ${\mu }^{+}$ relaxation rate is charact…