Band structure renormalization and weak pseudogap behavior in Na_{0.33}CoO_2: Fluctuation exchange study based on a single band model

Zi-Jian Yao, Jian-Xin Li, Z. D. Wang

Based on a single band Hubbard model and the fluctuation exchange approximation, the effective mass and the energy band renormalization in Na${}_{0.33}$CoO${}_2$ is elaborated. The ren…