Field-induced ferromagnetic phase transition in two-dimensional Fermi systems with magnetic dipole-dipole interaction

被引：0

作者：

Bordbar, G. H. ^{[1
,2
]}

Pouresmaeeli, F. ^{[1
]}

Poostforush, A. ^{[1
]}

机构：

[1] Shiraz Univ, Phys Dept, Shiraz 71454, Iran

[2] Univ Waterloo, Dept Phys & Astron, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada

来源：

PHYSICAL REVIEW A | 2018年 / 98卷 / 02期

关键词：

GROUND-STATE; CHARGELESS FERMIONS; MOMENT; GAS;

D O I：

10.1103/PhysRevA.98.023634

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Magnetic properties of two-dimensional (2D) spin-polarized Fermi gas with dipole-dipole interaction are studied in the presence of external magnetic field at zero temperature. Within perturbation theory and the second quantization formalism, the total energy is explicitly obtained as a function of three dimensionless parameters: the spin polarization, dipolar coupling, and Zeeman parameters. We examine the effects of these agents on the magnetic properties of 2D Fermi gas. The results show that an induced ferromagnetic phase transition is observed only for adequately large values of magnetic field. This paper offers two controllable factors to change the spin polarization of the system.

引用

页数：7

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