Direct measurement of the spin gaps in a gated GaAs two-dimensional electron gas
Journal
Nanoscale Research Letters
Journal Volume
8
Journal Issue
1
Pages
1-6
Date Issued
2013
Author(s)
Abstract
We have performed magnetotransport measurements on gated GaAs two-dimensional electron gases in which electrons are confined in a layer of the nanoscale. From the slopes of a pair of spin-split Landau levels (LLs) in the energy-magnetic field plane, we can perform direct measurements of the spin gap for different LLs. The measured g-factor g is greatly enhanced over its bulk value in GaAs (0.44) due to electron-electron (e-e) interactions. Our results suggest that both the spin gap and g determined from conventional activation energy studies can be very different from those obtained by direct measurements. © 2013 Huang et al.
SDGs
Type
journal article