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2004 | 106 | 3 | 311-317
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Single Particle and Collective Spin Excitations in Semimagnetic Quantum Wells

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Collective and single-particle spin-flip excitations of a two-dimensional electron gas in a semimagnetic Cd_{1-x}Mn_xTe 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.
  • CNRS/LPN, Route de Nozay, 91460 Marcoussis, France
  • CNRS/LPN, Route de Nozay, 91460 Marcoussis, France
  • Dept. of Physics, Kings College London, Strand, London WC2R 2LS, UK
  • Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warszawa, Poland
  • 1. A. Pinczuk, B.S. Dennis, D. Heiman, C. Kallin, L. Brey, C. Tejedor, S. Schmitt-Rink, L.N. Pfeiffer, K.W. West, Phys. Rev. Lett., 68, 3623, 1992; H.D.M. Davies, J.C. Harris, J.F. Ryan, A.J. Turberfield, Phys. Rev. Lett., 78, 4095, 1997
  • 2. J.A. Gaj, R. Planel, G. Fishman, Solid State Commun., 29, 435, 1979
  • 3. G. Karczewski, J. Jaroszyński, A. Barcz, M. Kutrowski, T. Wojtowicz, J. Kossut, J. Cryst. Growth, 184/185, 814, 1998
  • 4. B. Jusserand, G. Karczewski, G. Cywinski, T. Wojtowicz, A. Lema^itre, C. Testelin, C. Rigaux, Phys. Rev. B, 63, 161302, 2001
  • 5. B. Jusserand, M.N. Vijayaraghavan, F. Laruelle, A. Cavanna, B. Etienne, Phys. Rev. Lett., 85, 5400, 2000 and references therein
  • 6. A.K. Rajagopal, Phys. Rev. B, 17, 2980, 78; J.C. Ryan, Phys. Rev. B, 43, 4499, 1991; K.S. Yi, J.J. Quinn, Phys. Rev. B, 54 , 13398, 1996; J. Moreno, D.C. Marinescu, Phys. Rev. B, 68, 195210, 2003; P. Gori-Giorgi, J.P. Perdew, Phys. Rev. B, 69, 041103, 2004
  • 7. B. Jusserand, F. Perez, D. Richards, G. Karczewski, T. Wojtowicz, C. Testelin, D. Wolverson, J.J. Davies, Phys. Rev. Lett., 91, 086802, 2003
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