Collective excitations in an asymmetrically spin-polarized quantum well

D. C. Marinescu and J. J. Quinn
Phys. Rev. B 58, 13762 – Published 15 November 1998
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Abstract

We present a phenomenological picture for the many-body excitations of a two-dimensional electron gas in a quantum well spin polarized by a dc magnetic field at an angle θ with the axis of the well. In the framework of the Landau theory of charged Fermi liquids, we determine the frequencies of collective modes by solving a transport equation for quasiparticles in the local electromagnetic field associated with the charge- and spin-density fluctuations. In the long-wavelength limit, analytic solutions for ω(q) are obtained as functions of the degree of spin polarization and of the angle θ.

  • Received 9 July 1998

DOI:https://doi.org/10.1103/PhysRevB.58.13762

©1998 American Physical Society

Authors & Affiliations

D. C. Marinescu

  • Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831

J. J. Quinn

  • Department of Physics, University of Tennessee, Knoxville, Tennessee 37996

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Vol. 58, Iss. 20 — 15 November 1998

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