Exchange interaction in the yellow exciton series of cuprous oxide
| Autor: | Dmitri R. Yakovlev, Patric Rommel, Jörg Main, Manfred Bayer, Andreas Farenbruch |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics Series (mathematics) Numerical analysis Exciton Avoided crossing Exchange interaction Oxide Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics chemistry.chemical_compound chemistry 0103 physical sciences Principal quantum number Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 010306 general physics 0210 nano-technology Electronic band structure |
| DOI: | 10.48550/arxiv.2102.08900 |
| Popis: | We experimentally and numerically investigate the exchange interaction of the yellow excitons in cuprous oxide. By varying the material parameters in the numerical calculations, we can interpret experimental findings and understand their origin in the complex band structure and central-cell corrections. In particular, we experimentally observe the reversal of the ortho- and paraexciton for the $2S$ yellow exciton, and explain this phenomenon by an avoided crossing with the green $1S$ orthoexciton in a detailed numerical analysis. Furthermore, we discuss the exchange splitting as a function of the principal quantum number $n$ and its deviation from the $n^{-3}$ behavior expected from a hydrogenlike model. We also explain why the observed exchange splitting of the green $1S$ exciton is more than twice the splitting of the yellow $1S$ state. Comment: 9 pages, 4 figures, accepted for publication in Phys. Rev. B |
| Databáze: | OpenAIRE |
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