Electron-confined longitudinal optical phonon interaction and strong magnetic field effects on the binding energy in GaAs quantum wells

Abstract

Articles you may be interested inThe effects of optical phonon on the binding energy of bound polaron in a wurtzite ZnO/Mg x Zn1− x O quantum wellThe effect of a spatially dependent effective mass on hydrogenic impurity binding energy in a finite parabolic quantum well with a magnetic field Electric field effects on the states of a donor impurity in rectangular cross-section vacuum/GaAs/vacuum quantum-well wiresWe study the ground state binding energy of a hydrogenic impurity subjected to an external strong magnetic field taking into account the interaction of the electron with confined longitudinal optical phonon in GaAs/Ga 1Ϫx Al x As quantum wells. Calculations are performed within the effective mass approximation using the Lee-Low-Pines ͓Phys. Rev. 90, 297 ͑1953͔͒ variational method and considering the infinite and finite character of the barrier potential. The binding energy is calculated as a function of the magnetic field and the well size. The results we have obtained show that the binding energies are very sensitive to the combined effect of the well size, the strong applied magnetic field, and the electron-phonon interaction.

Dispersive Spectra of Phonon Modes and Fröhlich Electron–Phonon Coupling Properties in AlGaN Quantum Rings: Wurzite versus Zinc‐Blende Structure

“…These results show that the crystal structures have an important influence on the types of phonon modes and coupling strength of electron–phonon interaction in nitride QR structures. The results obtained in the present paper not only deepen the understanding of the influence of crystal structure on phonon modes and electron–phonon interaction, but also can be used to experimentally and theoretically study the polaronic properties [ 18–21,30,31 ] and the optical and transport properties in wurtzite and zinc‐blende nitride QR structures.…”

“…[ 17 ] This shows that crystal structures of nanomaterial affect greatly the vibrating features of crystal lattice. The calculated results of binding energies of polarons and bound polarons in GaAs‐based planar QWs, [ 18 ] cylindrical QWRs, [ 19 ] and spherical quantum dots (QDs) [ 20 ] and conical QDs [ 21 ] reveal that the confined dimension and morphology of cross section play a crucial role in the electron–phonon interaction in low‐dimensional quantum systems. Hence, it is very important to investigate the influence of crystal lattice structures and surface morphology on the phonon properties of quantum systems.…”

Magnetic field effect on the linear and nonlinear refractive index and optical absorption of a donor in a GaAs quantum ring

“…The reader is invited to examine the book [1] for a more detailed discussion of such properties in the QRs. Furthermore, theoretical studies of the problem of the presence of the impurity or the external fields in quantum rings and quantum dots (QDs) show the possibility of controlling the optical and electronic properties in these systems [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. The combined effect of the magnetic and electric fields on the impurity confined in InAs QRs has been investigated in [2].…”