Exciton spectrum in multi-shell hexagonal semiconductor nanotube

Abstract

The theory of exciton spectrum in multi-shell hexagonal semiconductor nanotube is developed within the effective masses and rectangular potentials approximations using the method of effective potential. It is shown that the exciton binding energy for all states non-monotonously depends on the inner wire diameter, approaching several minimal and maximal magnitudes. The obtained theoretical results explain well the experimental positions of luminescence peaks for GaAs/Al 0.4 Ga 0.6 As nanotubes.

Spectral parameters of electron in multi-shell open semiconductor nanotube

“…The multi-shell semiconductor nanotubes have been recently studied both theoretically and experimentally [1][2][3][4][5][6][7]. The unique properties of quasi-particles (electrons, excitons and so on) in these nanostructures allow using them as basic elements for the devices of modern nanoelectronics [8][9][10].…”

“…The theory of exciton and phonon stationary spectra together with the theory of electron-and exciton-phonon interaction well correlating to the experimental data and general physical considerations is already developed for the closed cylindrical and hexagonal nanotubes [5][6][7].…”

Exciton Spectra in Multi-Shell Open Semiconductor Nanotube

“…The theory of exciton and phonon stationary spectra together with the theory of electron-and exciton-phonon interaction well correlating to the experimental data and general physical considerations is already developed for the closed cylindrical and hexagonal nanotubes [5][6][7]. The quasistationary spectra of electrons, holes and excitons were theoretically studied for the sphericallysymmetric quantum dots and single cylindrical quantum wires [13][14][15][16][17].…”

“…The theory of exciton and phonon stationary spectra together with the theory of electronand exciton-phonon interaction well correlating to the experimental data and general physical considerations is already developed for the closed cylindrical and hexagonal nanotubes [5][6][7].…”

Oscillator Strengths of Quantum Transitions in Spherical Quantum Dot GaAs/AlxGa1-xAs/GaAs/AlxGa1-xAs with On-Center Donor Impurity

“…Such structures as multiple quantum rings [8], complex quantum wires [9,10] and the quantum dot quantum well (QDQW) structures The spectra of quasi-particles in QDQWs and inuence of geometric parameters and doped impurities is to be studied in detail in order to assure that the white light sources can be produced on their base. The pioneer theoretical and experimental investigations of multilayered spherical nanostructures were performed in [16,17].…”