J.A. Barker, D. Henderson, et al.
Molecular Physics
Using resonant-tunneling spectroscopy in magnetic fields up to 30 T, we have shown that the Landé factor g of two-dimensional electrons oscillates with field between its three-dimensional value and a value strongly enhanced by many-body effects. The experiments were carried out at 1.4 K in GaSb-AlSb-InAs-AlSb-GaSb type-II heterolayers, in which holes tunnel resonantly between two GaSb electrodes through magnetic states in the conduction band of an InAs quantum well. The density of these two-dimensional electrons was controlled by the application of external hydrostatic pressure. For the largest electron density (Ns=1.2×1012 cm-2) the g factor oscillated with field between a minimum value of 8 and a maximum of 15. Variations of the same order were observed for lower densities, down to Ns=5.2×1011 cm-2. This large enhancement is explained by the exchange interaction between electrons with the same spin. © 1993 The American Physical Society.
J.A. Barker, D. Henderson, et al.
Molecular Physics
R.J. Gambino, N.R. Stemple, et al.
Journal of Physics and Chemistry of Solids
J.V. Harzer, B. Hillebrands, et al.
Journal of Magnetism and Magnetic Materials
Ellen J. Yoffa, David Adler
Physical Review B