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

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      Author
      Podlesny I.V.
      Moskalenko, S.A.
      Hakioǧlu, T.
      Kiselyov, A.A.
      Gherciu L.
      Date
      2013
      Source Title
      Physica E: Low-Dimensional Systems and Nanostructures
      Print ISSN
      13869477
      Volume
      49
      Pages
      44 - 51
      Language
      English
      Type
      Article
      Item Usage Stats
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      129
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      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.
      Keywords
      Applied magnetic fields
      Conduction electrons
      Continuous transformations
      Energy spectra
      Exciton state
      First-order
      Heavy holes
      Landau levels
      Landau quantization
      Magnetoexciton
      Magnetoexcitons
      Nonparabolic dispersion
      Optical orientation
      Parabolic dispersion
      Quantum numbers
      Quantum transitions
      Rashba spin-orbit coupling
      Recombination lines
      Selection Rules
      Spin projections
      Spin-orbit couplings
      Third-order
      Two-band model
      Chirality
      Enantiomers
      Quantum theory
      Spectroscopy
      Two dimensional
      Semiconductor quantum wells
      Permalink
      http://hdl.handle.net/11693/21066
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.physe.2013.01.016
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