The Dependence of a Quantum Acoustoelectric Current on Some Qualities in a Cylindrical Quantum Wire with an Infinite Potential GaAs/GaAsAl

Abstract

The quantum acoustoelectric (QAE) current is studied by a quantum kinetic equation method and we obtain analytic expression for QAE in a cylindrical quantum wire with an infinite potential (CQWIP) GaAs/GaAsAl. The computational results show that the dependence of the QAE current on the radius of CQWIP GaAs/GaAsAl, the Fermi energy ¾ F and temperature T is non-monotonic, and the appearance of peak when the(n 6 ¼ n 0 and N 6 ¼ N 0 ) is satisfied. Our result indicates that the dominant mechanism for such a behavior is the electron confinement in the CQWIP GaAs/GaAsAl and transitions between mini-bands. All these results are compared with those for normal bulk semiconductors and superlattice to show the differences. The dependence of a QAE current on some qualities in a CQWIP GaAs/GaAsAl is newly developed. Keywords: cylindrical quantum wire, quantum acoustoelectric current, electron-external acoustic wave interaction, electron-acoustic phonon scattering, quantum kinetic equation

Interaction of External Acoustic Waves - Confined Electrons - Internal Phonons in a Cylindrical Quantum Wire with an Infinite Potential in the Presence of an External Magnetic Field

“…In one -dimensional semiconductors, the confined electron -external acoustic wave interaction and the electron -internal acoustic phonon (internal phonon) scattering for a CQWIP without the presence of an EMF have been studied [15]. It is shown that the acoustoelectric current depends on the radius of the quantum wires, the frequency of external acoustic waves and temperature.…”