Spin-orbit interactions in bilayer exciton-condensate ferromagnets
Abstract
Bilayer electron-hole systems with unequal electron and hole densities are expected to have exciton-condensate ground states with spontaneous spin polarization in both conduction and valence bands. In the absence of spin-orbit and electron-hole exchange interactions there is no coupling between the spin orientations in the two quantum wells. In this paper we show that Rashba spin-orbit interactions lead to unconventional magnetic anisotropies, whose strength we estimate, and to ordered states with unusual quasiparticle spectra.
- Publication:
-
Physical Review B
- Pub Date:
- June 2009
- DOI:
- 10.1103/PhysRevB.79.235329
- arXiv:
- arXiv:0905.0392
- Bibcode:
- 2009PhRvB..79w5329S
- Keywords:
-
- 73.21.Fg;
- 71.35.Lk;
- 03.75.Nt;
- Quantum wells;
- Collective effects;
- Other Bose-Einstein condensation phenomena;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 36 pages, 12 figures