Periodic Anderson model with electron-phonon correlated conduction band

被引：11

作者：

Zhang, Peng ^{[1
]}

Reis, Peter ^{[1
]}

Tam, Ka-Ming ^{[1
]}

Jarrell, Mark ^{[1
]}

Moreno, Juana ^{[1
]}

Assaad, Fakher ^{[2
]}

McMahan, A. K. ^{[3
]}

机构：

[1] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[2] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97070 Wurzburg, Germany

[3] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 12期

基金：

美国国家科学基金会;

关键词：

ALPHA-GAMMA-TRANSITION; KONDO VOLUME-COLLAPSE; POLARON MOTION; CERIUM;

D O I：

10.1103/PhysRevB.87.121102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 gamma-alpha 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. DOI: 10.1103/PhysRevB.87121102

引用

页数：4

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