scholarly journals Impurity-band optical transitions in two-dimensional Dirac materials under strain-induced synthetic magnetic field

2021 ◽  
Vol 103 (24) ◽  
Author(s):  
M. V. Boev ◽  
I. G. Savenko ◽  
V. M. Kovalev
Keyword(s):  
Magnetic Field ◽  
Impurity Band ◽  
Optical Transitions ◽  
Two Dimensional ◽  
Dirac Materials ◽  
Synthetic Magnetic Field

FREE AND DONOR-BOUND CHARGED MAGNETOEXCITONS IN QUANTUM WELLS

2007 ◽  
Vol 21 (08n09) ◽  
pp. 1563-1567 ◽  
Author(s):  
ALEXANDER B. DZYUBENKO ◽  
DIANA A. COSMA ◽  
ANDREY Yu. SIVACHENKO
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Quantum Wells ◽  
Singlet State ◽  
Optical Transitions ◽  
Two Dimensional ◽  
Spin Singlet ◽  
Spin Triplet ◽  
Distinct Features ◽  
The Magnetic Field

We consider eigenstates and magneto-optical transitions of free and donor-bound spin-singlet and spin-triplet charged magnetoexcitons in quasi-two-dimensional quantum wells. We show that the bright singlet state remains always bound while spin-triplet dark and bright states become unbound when the distance to the donor ion becomes smaller than certain critical values, which depend on the magnetic field strength. We demonstrate that main magneto-photoluminescence lines of free and donor-bound charged excitons exhibit very similar features. However, shake-up processes in photoluminescence of free trions are strictly prohibited. Therefore, shake-up transitions are distinct features indicating that symmetry-breaking mechanisms are present in the system.

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