Collective excitations in an asymmetrically spin-polarized quantum well

Journal Article · Sun Nov 01 00:00:00 EST 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.58.13762· OSTI ID:664716

Marinescu, D C ^[1]; Quinn, J J ^[2]

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1. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
2. Department of Physics, University of Tennessee, Knoxville, Tennessee 37996 (United States)

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 {theta} 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 {omega}({rvec q}) are obtained as functions of the degree of spin polarization and of the angle {theta}. thinsp thinsp {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 664716
• Journal Information: Physical Review, B: Condensed Matter, Vol. 58, Issue 20; Other Information: PBD: Nov 1998
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
PLASMONS
COLLECTIVE EXCITATIONS
ELECTRON GAS
MAGNETIC FIELDS
LANDAU QUASI PARTICLES
SPIN WAVES
POLARIZATION
WAVE PROPAGATION
CHARGE DENSITY