CALCULATIONS OF THE SPIN DEPENDENCE OF TRANSPORT AND OPTICAL-PROPERTIES IN WIDE PARABOLIC QUANTUM-WELLS

We use self-consistent solutions to Schrödingers and Poissons equations to calculate several observable characteristics of wide parabolic quantum wells in a perpendicular magnetic field. We calculate the dc magnetoconductivity, optical absorption, and acceptor photoluminescence of electrons in these wells. Spin effects are included in both the bare interaction with the magnetic field and the many-body interactions through a local-spin-density exchange-correlation potential. We find several observable signatures of spin effects, enhanced by many-body interactions, in both the magnetotransport and the optical properties of these wells. These include disappearance of integer quantum Hall effect minima in the resistivity, spin polarization, magnetic depopulation of states, and nonlinear Landau fan diagrams. We relate details of these observable phenomena to their microscopic origins in these systems. © 1994 The American Physical Society.