検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

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

変分モンテカルロ法による周期アンダーソンモデルの磁性状態の研究

久保 勝規 

Kubo, Katsunori

The periodic Anderson model has been studied as a typical model for f-electron systems. However, the knowledge on magnetism of this model is still limited. Here, we investigate magnetic states of the periodic Anderson model on a square lattice by applying the variational Monte Carlo method. We consider the Gutzwiller wavefunctions for the paramagnetic, antiferromagnetic, ferromagnetic, and charge density wave states as variational wavefunctions. Then, we evaluate energy of each state by the Monte Carlo method and determine the ground state. Around half-filling (the number of electrons n per site is two), we find an antiferromagnetic phase for a small hybridization matrix element V and a deep f level. When carriers are doped enough, for example, n=1.5, we find a half-metallic phase in a wide parameter region. It is consistent with the previous study for the ferromagnetism by the Gutzwiller approximation. We will also discuss the physical quantities in these phases.

Access

:

- Accesses

InCites™

:

パーセンタイル:72.35

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.