Coupled spin and charge collective excitations in a spin polarized electron gas
- Oak Ridge National Lab., TN (United States). Solid State Div.
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics
- Pusan Univ. (Korea, Republic of). Dept. of Physics
The charge and longitudinal spin responses induced in a spin polarized quantum well by a weak electromagnetic field are investigated within the framework of the linear response theory. The authors evaluate the excitation frequencies for the intra- and inter-subband transitions of the collective charge and longitudinal spin density oscillations including many-body corrections beyond the random phase approximation through the spin dependent local field factors, G{sub {sigma}}{sup {+-}} (q,{omega}). An equation-of-motion method was used to obtain these corrections in the limit of long wavelengths, and the results are given in terms of the equilibrium pair correlation function. The finite degree of spin polarization is shown to introduce coupling between the charge and spin density modes, in contrast with the result for an unpolarized system.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 563299
- Report Number(s):
- ORNL/CP-95305; CONF-9709161-; ON: DE98001428; BR: KC0202030; TRN: 98:002769
- Resource Relation:
- Conference: EP2DS-12: 12. international conference on the electronic properties of two-dimensional systems, Tokyo (Japan), 21-26 Sep 1997; Other Information: PBD: 12 Aug 1997
- Country of Publication:
- United States
- Language:
- English
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