This Rapid Communication reports dynamical mean-field calculations for the periodic Anderson model in which the conduction band is coupled to phonons. Motivated in part by recent attention to the role of phonons in the γ-α transition in Ce, this model yields a rich and unexpected phase diagram which is of intrinsic interest. Specifically, above a critical value of the electron-phonon interaction, a first-order transition with two coexisting phases develops in the temperature-hybridization plane, which terminates at a second-order critical point. The coexisting phases display the familiar Kondo screened and local-moment character, yet they also exhibit pronounced polaronic and bipolaronic properties, respectively. © 2013 American Physical Society.
Publication Source (Journal or Book title)
Physical Review B - Condensed Matter and Materials Physics
Zhang, P., Reis, P., Tam, K., Jarrell, M., Moreno, J., Assaad, F., & McMahan, A. (2013). Periodic Anderson model with electron-phonon correlated conduction band. Physical Review B - Condensed Matter and Materials Physics, 87 (12) https://doi.org/10.1103/PhysRevB.87.121102