a-b plane optical conductivity in YBa_2Cu_3O_{7-delta} above and below T*

D. Mihailovic, T. Mertelj, K. A. Mueller

Analysis of the a-b plane optical conductivity ${\sigma }_{ab}$ for both twinned and untwinned YBa${}_2$Cu${}_3$O${}_{7-\delta }$ as a function of temperature and doping shows that below a well de…