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26 April 2024

» pubmed » pmid14525266

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Spin excitations of the spin-polarized electron gas in semimagnetic quantum wells
B Jusser ; F Perez ; D R Richards ; G Karczewski ; T Wojtowicz ; C Testelin ; D Wolverson ; J J Davies ;
Date:	22 Aug 2003
Journal:	Phys Rev Lett, 91 (8), 086802
Abstract:	Collective and single-particle spin-flip excitations of a two-dimensional electron gas in a semimagnetic Cd(1-x)Mn(x)Te quantum well are observed by resonant Raman scattering. Application of a magnetic field splits the spin subbands and a spin polarization is induced in the electron gas. Above 1 T the collective modes, which disperse with the in-plane wave vector, dominate the spectra. The local spin-density approximation provides a good description of our results and enables us to confirm that the energy of the low wave vector collective mode is given by the bare Zeeman energy.
Source:	PubMed, pmid14525266
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