Landau quantization of two-dimensional heavy holes, energy spectrum of magnetoexcitons and Auger-recombination lines

Date
2013
Authors
Podlesny I.V.
Moskalenko, S.A.
Hakioǧlu, T.
Kiselyov, A.A.
Gherciu L.
Editor(s)
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Physica E: Low-Dimensional Systems and Nanostructures
Print ISSN
13869477
Electronic ISSN
Publisher
Volume
49
Issue
Pages
44 - 51
Language
English
Journal Title
Journal ISSN
Volume Title
Series
Abstract

The Landau quantization of the two-dimensional (2D) heavy holes, its influence on the energy spectrum of 2D magnetoexcitons, as well as their optical orientation are studied. The Hamiltonian of the heavy holes is written in two-band model taking into account the Rashba spin-orbit coupling (RSOC) with two spin projections, but with nonparabolic dispersion law and third-order chirality terms. The most Landau levels, except three with m=0,1,2, are characterized by two quantum numbers m-3 and m for m≥3 for two spin projections correspondingly. The difference between them is determined by the third-order chirality. Four lowest Landau levels (LLLs) for heavy holes were combined with two LLLs for conduction electron, which were taken the same as they were deduced by Rashba in his theory of spin-orbit coupling (SOC) based on the initial parabolic dispersion law and first-order chirality terms. As a result of these combinations eight 2D magnetoexciton states were formed. Their energy spectrum and the selection rules for the quantum transitions from the ground state of the crystal to exciton states were determined. On this base such optical orientation effects as spin polarization and magnetoexciton alignment are discussed. The continuous transformation of the shake-up (SU) into the shake-down (SD) recombination lines is explained on the base of nonmonotonous dependence of the heavy hole Landau quantization levels as a function of applied magnetic field. © 2013 Elsevier B.V. All rights reserved.

Course
Other identifiers
Book Title
Citation
Published Version (Please cite this version)