Optical conductivity in the CuO double chains of PrBa_2Cu_4O_8: Consequences of charge fluctuation

R. Amasaki, Y. Shibata, Y. Ohta

We calculate the optical conductivity of the CuO double chains of PrBa${}_2$Cu${}_4$O${}_8$ by the mean-field approximation for the coupled two-chain Hubbard model around quarter filling…