5 research outputs found
Electron energy spectrum and oscillator strengths of quantum transitions in double quantum ring nanostructure driven by electric field
The effect of homogeneous electric field on the energy spectrum, wave
functions of electron and oscillator strengths of intra-band quantum
transitions in a double cylindrical quantum ring (GaAs/AlGaAs) is
studied within the approximations of effective mass and rectangular potentials.
The calculations are performed using the method of expansion of quasiparticle
wave function over a complete set of cylindrical wave functions obtained as
exact solutions of Schr\"odinger equation for an electron in a nanostructure
without electric field. It is shown that the electric field essentially affects
the electron localization in the rings of a nanostructure. Herein, the electron
energies and oscillator strengths of intra-band quantum transitions
non-monotonously depend on the intensity of electric field.Comment: 9 pages, 5 figure
Electronic Conductivity in Open Cylindrical Two-Barrier Symmetric Resonance Tunnel Structure
The theory of resonance energies and widths of electron quasi-stationary states and electronic conductivity in open cylindrical two-barrier symmetric resonance tunnel structure is developed. The complete Schrodinger equation is solved within the model of effective masses for rectangular potential wells and barriers. Interaction between electrons and electromagnetic field was taken into account using the approximation of the small signal. The calculations of spectral parameters are performed for / resonance tunnel structure. The dependences of conductivity on the energy of mono-energy electrons beam falling at the system and electromagnetic field energy absorbed or emitted by the system are obtained and analyzed. The relation between experimentally measured parameters of conductivity and resonance widths of electron quasi-stationary states in open resonance tunnel structure is established