Polaron mass of charge carriers in semiconductor quantum wells
Abstract
A theory of the interaction of charge carriers with optical phonons in a quantum well is developed with consideration for interface optical phonons. The dependence of the polaron effective mass on the quantum-well dimensions and dielectric characteristics of barriers is analyzed in detail. It is shown that, in narrow quantum wells, a quasi-two-dimensional polaron can be formed. In this case, however, the interaction parameters are defined by the charge-carrier effective mass in the quantum well and by the frequencies of interface optical phonons. If barriers are made of a nonpolar material, the polaron effective mass depends on the quantum-well width. As the quantum-well width is increased, a new mechanism of enhancement of the electron–phonon interaction develops. The mechanism is implemented, if the optical phonon energy is equal to the energy of one of the electronic transitions. This condition yields an unsteady dependence of the polaron effective mass on the quantum-well width.
- Authors:
-
- Russian Academy of Sciences, Ioffe Physical–Technical Institute (Russian Federation)
- Publication Date:
- OSTI Identifier:
- 22469719
- Resource Type:
- Journal Article
- Journal Name:
- Semiconductors
- Additional Journal Information:
- Journal Volume: 49; Journal Issue: 10; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7826
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; CHARGE CARRIERS; DIELECTRIC MATERIALS; EFFECTIVE MASS; ELECTRON-PHONON COUPLING; ELECTRONS; INTERFACES; PHONONS; POLARONS; QUANTUM WELLS; SEMICONDUCTOR MATERIALS; TWO-DIMENSIONAL SYSTEMS
Citation Formats
Maslov, A. Yu., E-mail: maslov.ton@mail.ioffe.ru, and Proshina, O. V. Polaron mass of charge carriers in semiconductor quantum wells. United States: N. p., 2015.
Web. doi:10.1134/S1063782615100152.
Maslov, A. Yu., E-mail: maslov.ton@mail.ioffe.ru, & Proshina, O. V. Polaron mass of charge carriers in semiconductor quantum wells. United States. https://doi.org/10.1134/S1063782615100152
Maslov, A. Yu., E-mail: maslov.ton@mail.ioffe.ru, and Proshina, O. V. 2015.
"Polaron mass of charge carriers in semiconductor quantum wells". United States. https://doi.org/10.1134/S1063782615100152.
@article{osti_22469719,
title = {Polaron mass of charge carriers in semiconductor quantum wells},
author = {Maslov, A. Yu., E-mail: maslov.ton@mail.ioffe.ru and Proshina, O. V.},
abstractNote = {A theory of the interaction of charge carriers with optical phonons in a quantum well is developed with consideration for interface optical phonons. The dependence of the polaron effective mass on the quantum-well dimensions and dielectric characteristics of barriers is analyzed in detail. It is shown that, in narrow quantum wells, a quasi-two-dimensional polaron can be formed. In this case, however, the interaction parameters are defined by the charge-carrier effective mass in the quantum well and by the frequencies of interface optical phonons. If barriers are made of a nonpolar material, the polaron effective mass depends on the quantum-well width. As the quantum-well width is increased, a new mechanism of enhancement of the electron–phonon interaction develops. The mechanism is implemented, if the optical phonon energy is equal to the energy of one of the electronic transitions. This condition yields an unsteady dependence of the polaron effective mass on the quantum-well width.},
doi = {10.1134/S1063782615100152},
url = {https://www.osti.gov/biblio/22469719},
journal = {Semiconductors},
issn = {1063-7826},
number = 10,
volume = 49,
place = {United States},
year = {Thu Oct 15 00:00:00 EDT 2015},
month = {Thu Oct 15 00:00:00 EDT 2015}
}