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61.
The plasma waves and coupled plasmon-acoustic waves due to piezoelectrical effect in superlattices are investigated theoretically. The dispersion relations are obtained, and it is shown that under certain conditions the group velocity of the waves can be extremely small. 相似文献
62.
Bound states of composite particles in single and double quantum wells are studied. The spectrum and polarizability of an indirect trion and an indirect D ? center (a negatively charged donor) in crossed electric and magnetic fields are found. Bound dielectron states in a single quantum well are studied. The possibility of observing a dielectron experimentally by the magnetic-dipole absorption of electromagnetic waves is pointed out. 相似文献
63.
Oscillations of a 2D electron plasma in a transverse magnetic field have been theoretically studied taking into account spin-orbit interaction. Four branches of spin-plasmon oscillations associated with different selection rules for spin and orbital quantum numbers have been shown to appear at a small plasmon momentum in a semiclassical limit (the Fermi energy is much higher than the Landau quantum). In the quantum case (the filling factor ν is about unity), the number of branches changes from three to six depending on ν value. 相似文献
64.
L. I. Magarill A. V. Chaplik M. V. Éntin 《Journal of Experimental and Theoretical Physics》2001,92(1):153-158
Interaction of the spins of 2D electrons with an alternating electric field in the plane of the system is considered. It is assumed that the double spin degeneracy is eliminated by the spin-orbit splitting. It is shown that transitions between different spin states produce a narrow absorption band in the degenerate electron gas. In the frequency domain corresponding to these transitions, those frequencies are combined with two-dimensional plasmons; as a result, the plasmon spectrum is modified, and a new type of oscillations occurs, namely, a spin-plasmon polariton. The dispersion law of these oscillations is derived. The problem of the excitation of spin-plasmon polaritons by an external electromagnetic field is solved. 相似文献
65.
JETP Letters - Electronic processes involving a charged impurity in a transition metal dichalcogenide monolayer and in gapped graphene have been theoretically studied. The spectrum of bound states,... 相似文献
66.
Resonant Raman scattering in quantum rings with a sufficiently large number of conduction electrons has been studied. The cross section for Raman scattering accompanied by the excitation of a one-dimensional plasmon in a ring has been determined in the self-consistent field approximation. 相似文献
67.
A. V. Chaplik 《JETP Letters》2016,104(11):791-795
The temperature of Bose–Einstein condensation and the fraction of particles in a condensate for a system of spatially indirect dipole excitons in an electrostatic ring trap have been found. If only levels of the radial motion close to the bottom of the potential well of the trap are populated considerably, the oscillatory model of the single-particle spectrum is applicable. In this case, even the strong exciton–exciton interaction can be taken into account. 相似文献
68.
R. Z. Vitlina L. I. Magarill A. V. Chaplik 《Journal of Experimental and Theoretical Physics》2011,113(2):282-287
Low-frequency magnetoplasmon modes in a one-dimensional lateral superlattice with Rashba spin-orbit splitting are considered.
Such modes correspond to oscillations related to virtual transitions within a Landau level that become possible due to the
broadening of each Landau level into a band produced by the superlattice potential. The specificity of the one-dimensional
intersubband plasmons emerging in such a system has been revealed. 相似文献
69.
The possibilities of spatially localizing spin-polarized electrons in two-dimensional and three-dimensional systems due to spin-orbit interaction are studied theoretically. Using simple one-dimensional potentials as examples, it is demonstrated that electrons with a definite helicity can be localized so that carrier separation by spin is accomplished. The magnetic field effect is studied, and it is shown that the position of bound levels depends substantially on this effect. 相似文献
70.
The quasiparticle lifetime in a two-dimensional direct band semimetal limited by inelastic Coulomb scattering has been calculated
in the case where two types of charge carriers are present. It has been shown that the electron lifetime at low and high concentrations
of holes is mainly determined by the electron-hole and electron-electron scattering, respectively. 相似文献