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arXiv · 1608.04774

Inversion of Zeeman splitting of exciton states in InGaAs quantum wells

P. S. Grigoryev·O. A. Yugov·S. A. Eliseev·Yu. P. Efimov·V. A. Lovtcius·V. V. Petrov·V. F. Sapega·I. V. Ignatiev
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Abstract

Zeeman splitting of quantum-confined states of excitons in InGaAs quantum wells (QWs) is experimentally found to depend strongly on quantization energy. Moreover, it changes sign when the quantization energy increases with a decrease in the QW width. In the 87-nm QW, the sign change is observed for the excited quantum-confined states, which are above the ground state only by a few meV. A two-step approach for the numerical solution of the two-particle Schroedinger equation, taking into account the Coulomb interaction and valence-band coupling, is used for a theoretical justification of the observed phenomenon. The calculated variation of the g-factor convincingly follows the dependencies obtained in the experiments.

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P. S. Grigoryev, O. A. Yugov, S. A. Eliseev, Yu. P. Efimov, V. A. Lovtcius, V. V. Petrov, V. F. Sapega, I. V. Ignatiev. 2016-08-16. Inversion of Zeeman splitting of exciton states in InGaAs quantum wells. https://doi.org/10.1103/physrevb.93.205425

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