Abstract
We discuss a general form of the exchange energy for a homogeneous system of interacting electrons in two spatial dimensions, which is particularly suited in the presence of a generic spin-orbit interaction. The theory is best formulated in terms of a generalized fractional electronic polarization. Remarkably, we find that a net generalized polarization does not necessarily translate into an increase in the magnitude of the exchange energy, a fact that, in turn, favors unpolarized states. Our results account qualitatively for the findings of recent experimental investigations.
Published in:
Physical Review B 75,15 (2007) 155305;
Link to original published article:
http://dx.doi.org/10.1103/PhysRevB.75.155305
Keywords
Physics, Condensed Matter
Date of Version
January 2007
Recommended Citation
Chesi, S. and Giuliani, G. F., "Exchange energy and generalized polarization in the presence of spin-orbit coupling
in two dimensions" (2007). Department of Physics and Astronomy Faculty Publications. Paper 742.
https://docs.lib.purdue.edu/physics_articles/742