Abstract
Collective and single-particle spin-flip excitations of a two-dimensional electron gas in a semimagnetic Cd1-xMnxTe 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 some critical field, a collective spin-flip mode, which disperses with in-plane wave vector, dominates the spectra. The energy of this mode is given by the bare Zeeman energy at vanishing wave vector as predicted by Larmor's theorem and its in-plane dispersion is well described by a model of the interacting polarizability of a spin polarized electron gas when both exchange and correlation are taken into account.
| Original language | English |
|---|---|
| Pages (from-to) | 311 - 317 |
| Number of pages | 7 |
| Journal | ACTA PHYSICA POLONICA SERIES A |
| Volume | 106 |
| Issue number | 3 |
| Publication status | Published - Sept 2004 |
| Event | International Workshop on Optical Properties of 2D Systems with Interacting Carriers - Warsaw, Poland Duration: 1 Jan 2004 → … |
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