Stoner Ferromagnetism in a Momentum-Confined Interacting 2D Electron Gas

被引：1

作者：

Antebi, Ohad ^{[1
]}

Stern, Ady ^{[1
]}

Berg, Erez ^{[1
]}

机构：

[1] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel

来源：

PHYSICAL REVIEW LETTERS | 2024年 / 132卷 / 08期

基金：

欧洲研究理事会;

关键词：

GROUND-STATE; SUPERCONDUCTIVITY; BAND;

D O I：

10.1103/PhysRevLett.132.086501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this work we investigate the ground state of a momentum -confined interacting 2D electron gas, a momentum -space analog of an infinite quantum well. The study is performed by combining analytical results with a numerical exact diagonalization procedure. We find a ferromagnetic ground state near a particular electron density and for a range of effective electron (or hole) masses. We argue that this observation may be relevant to the generalized Stoner ferromagnetism recently observed in multilayer graphene systems. The collective magnon excitations exhibit a linear dispersion, which originates from a diverging spin stiffness.

引用

页数：6

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