Rydberg excitons in electric and magnetic fields obtained with the complex-coordinate-rotation method
Abstract
The complete theoretical description of experimentally observed magnetoexcitons in cuprous oxide has been achieved by Schweiner et al (2017 Phys. Rev. B 95 035202), using a complete basis set and taking into account the valence band structure and the cubic symmetry of the solid. Here, we extend these calculations by investigating numerically the autoionising resonances of cuprous oxide in electric fields and in parallel electric and magnetic fields oriented in [001] direction. To this aim we apply the complex-coordinate-rotation method. Complex resonance energies are computed by solving a non-Hermitian generalised eigenvalue problem, and absorption spectra are simulated by using relative oscillator strengths. The method allows us to investigate the influence of different electric and magnetic field strengths on the position, the lifetime, and the shape of resonances.
- Publication:
-
Journal of Physics B Atomic Molecular Physics
- Pub Date:
- March 2020
- DOI:
- 10.1088/1361-6455/ab6274
- arXiv:
- arXiv:1910.13941
- Bibcode:
- 2020JPhB...53e4004Z
- Keywords:
-
- Rydberg excitons;
- complex coordinate-rotation;
- electric and magnetic fields;
- cuprous oxide;
- Condensed Matter - Materials Science;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Quantum Physics
- E-Print:
- 9 pages, 6 figures, submitted to J. Phys. B