TY - JOUR
T1 - Stoner ferromagnetism in a momentum-confined interacting 2D electron gas
AU - Antebi, Ohad
AU - Stern, Ady
AU - Berg, Erez
N1 - Publisher Copyright: © 2024 American Physical Society.
PY - 2024/2/23
Y1 - 2024/2/23
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85185884185&partnerID=8YFLogxK
U2 - https://doi.org/10.48550/arXiv.2305.13373
DO - https://doi.org/10.48550/arXiv.2305.13373
M3 - مقالة
SN - 0031-9007
VL - 132
JO - Physical review letters
JF - Physical review letters
IS - 8
M1 - 086501
ER -