Role of Umklapp Processes in Conductivity of Doped Two-Leg Ladders

Patrick Byrne, Eugene H. Kim, Catherine Kallin

Recent conductivity measurements performed on the hole-doped two-leg ladder material $\mathrm{S}{\mathrm{r}}_{14-\mathrm{x}}\mathrm{C}{\mathrm{a}}_{\mathrm{x}}\mathrm{C}{\mathrm{u}}_{24}{\mathrm{O}}_{41}$ reveal an approximately linear power law regime in the c-…