Itinerant ferromagnetism in a Fermi gas with contact interaction: Magnetic properties in a dilute Hubbard model

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	Itinerant ferromagnetism in a Fermi gas with contact interaction: Magnetic properties in a dilute Hubbard model
	Chang, CC ; Zhang, SW ; Ceperley, DM
刊名	PHYSICAL REVIEW A
	2010
卷号	82 期号:6
关键词	GROUND-STATE BAND ENERGY NARROW
ISSN号	1050-2947
通讯作者	Chang, CC: Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA.
中文摘要	Ground-state properties of the repulsive Hubbard model on a cubic lattice are investigated by means of the auxiliary-field quantum Monte Carlo method. We focus on low-density systems with varying on-site interaction U/t, as a model relevant to recent experiments on itinerant ferromagnetism in a dilute Fermi gas with contact interaction. Twist-average boundary conditions are used to eliminate open-shell effects and large lattice sizes are studied to reduce finite-size effects. The sign problem is controlled by a generalized constrained path approximation. We find no ferromagnetic phase transition in this model. The ground-state correlations are consistent with those of a paramagnetic Fermi liquid.
收录类别	SCI
资助信息	Army Research Office [56693-PH]; National Science Foundation [DMR-1006217]; Optical Lattice Emulator program
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/40416]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Chang, CC,Zhang, SW,Ceperley, DM. Itinerant ferromagnetism in a Fermi gas with contact interaction: Magnetic properties in a dilute Hubbard model[J]. PHYSICAL REVIEW A,2010,82(6).
APA	Chang, CC,Zhang, SW,&Ceperley, DM.(2010).Itinerant ferromagnetism in a Fermi gas with contact interaction: Magnetic properties in a dilute Hubbard model.PHYSICAL REVIEW A,82(6).
MLA	Chang, CC,et al."Itinerant ferromagnetism in a Fermi gas with contact interaction: Magnetic properties in a dilute Hubbard model".PHYSICAL REVIEW A 82.6(2010).