Anomalous behaviors of the charge and spin degrees of freedom in the CuO double chains of PrBa${}_2$Cu${}_4$O${}_8$

Satoshi Nishimoto, Yukinori Ohta

The density-matrix renormalization-group method is used to study the electronic states of a two-chain Hubbard model for CuO double chains of PrBa${}_2$Cu${}_4$O${}_8$. We show that the m…