Kinetics of intrasubband electron energy relaxation in quantum wells in a quantizing magnetic field

M. P. Telenkov, Yu A. Mityagin, T. N.V. Doan, K. K. Nagaraja

Research output: Contribution to journalArticle

Abstract

Herein we report the intrasubband relaxation of electron energy in the Landau level system of quantum well as a function of magnetic field strength. The relative role of scattering processes contributing to relaxation kinetics, the electron-electron scattering which redistributes the electrons between Landau levels and the optical phonon emission by the electrons reaching the Landau levels lying near and above the optical phonon energy is revealed. It was shown the most important factor determining the kinetics of energy relaxation is the electron-electron scattering processes, delivering electrons to Landau levels close to optical phonon energy. The flux of these electrons depends on the number of the Landau levels lying below the energy of the optical phonon and increases substantially with a decrease in this number. On the contrary, the electron-phonon scattering rate dependence of the energy relaxation time was found to be much weaker.

Original languageEnglish
Pages (from-to)11-15
Number of pages5
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume104
DOIs
Publication statusPublished - 01-10-2018

Fingerprint

Semiconductor quantum wells
quantum wells
electron energy
Magnetic fields
Kinetics
Electrons
kinetics
Electron scattering
magnetic fields
electrons
electron scattering
energy
Phonon scattering
scattering
Relaxation time
field strength
relaxation time
Scattering
Fluxes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Cite this

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abstract = "Herein we report the intrasubband relaxation of electron energy in the Landau level system of quantum well as a function of magnetic field strength. The relative role of scattering processes contributing to relaxation kinetics, the electron-electron scattering which redistributes the electrons between Landau levels and the optical phonon emission by the electrons reaching the Landau levels lying near and above the optical phonon energy is revealed. It was shown the most important factor determining the kinetics of energy relaxation is the electron-electron scattering processes, delivering electrons to Landau levels close to optical phonon energy. The flux of these electrons depends on the number of the Landau levels lying below the energy of the optical phonon and increases substantially with a decrease in this number. On the contrary, the electron-phonon scattering rate dependence of the energy relaxation time was found to be much weaker.",
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Kinetics of intrasubband electron energy relaxation in quantum wells in a quantizing magnetic field. / Telenkov, M. P.; Mityagin, Yu A.; Doan, T. N.V.; Nagaraja, K. K.

In: Physica E: Low-Dimensional Systems and Nanostructures, Vol. 104, 01.10.2018, p. 11-15.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Kinetics of intrasubband electron energy relaxation in quantum wells in a quantizing magnetic field

AU - Telenkov, M. P.

AU - Mityagin, Yu A.

AU - Doan, T. N.V.

AU - Nagaraja, K. K.

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AB - Herein we report the intrasubband relaxation of electron energy in the Landau level system of quantum well as a function of magnetic field strength. The relative role of scattering processes contributing to relaxation kinetics, the electron-electron scattering which redistributes the electrons between Landau levels and the optical phonon emission by the electrons reaching the Landau levels lying near and above the optical phonon energy is revealed. It was shown the most important factor determining the kinetics of energy relaxation is the electron-electron scattering processes, delivering electrons to Landau levels close to optical phonon energy. The flux of these electrons depends on the number of the Landau levels lying below the energy of the optical phonon and increases substantially with a decrease in this number. On the contrary, the electron-phonon scattering rate dependence of the energy relaxation time was found to be much weaker.

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