Variational Monte Carlo study of magnetic states in the periodic Anderson model

International Conference on Strongly Correlated Electron Systems 2014

Kubo, Katsunori^1

Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki-Tokai

319-1195, Japan^1

关键词: Antiferromagnetic phase;    Antiferromagnetics;    Charge density wave state;    Fermi surface topology;    Ferromagnetic state;    Periodic Anderson model;    Variational Monte Carlo;    Variational Monte Carlo method;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012039/pdf
DOI  :  10.1088/1742-6596/592/1/012039

来源: IOP

【 摘 要 】

We study the magnetic states of the periodic Anderson model with a finite Coulomb interaction between f electrons on a square lattice by applying variational Monte Carlo method. We consider Gutzwiller wavefunctions for the paramagnetic, antiferromagnetic, ferromagnetic, and charge density wave states. We find an antiferromagnetic phase around half-filling. There is a phase transition accompanying change in the Fermi-surface topology in this antiferromagnetic phase. We also study a case away from half-filling, and find a ferromagnetic state as the ground state there.