Effective mass suppression in a ferromagnetic two-dimensional electron liquid
Date
2009
Advisor
Instructor
Source Title
Physical Review B - Condensed Matter and Materials Physics
Print ISSN
1098-0121
Electronic ISSN
Publisher
The American Physical Society
Volume
79
Issue
23
Pages
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract
We present numerical calculations of the electron effective mass in an interacting ferromagnetic two-dimensional electron system. We consider quantum interaction effects associated with the charge-density fluctuation-induced many-body vertex corrections. Our theory, which is free of adjustable parameters, reveals that the effective mass is suppressed (relative to its band value) in the strong-coupling limit, in good agreement with recent experimental results. © 2009 The American Physical Society.