Absence of a giant Rashba effect in the valence band of lead halide perovskites
- For hybrid organic-inorganic as well as all-inorganic lead halide perovskites a Rashba effect has been invoked to explain the high efficiency in energy conversion by prohibiting direct recombination. Both a bulk and surface Rashba effect have been predicted. In the valence band of methylammonium (MA) lead bromide a Rashba effect has been reported by angle-resolved photoemission and circular dichroism with giant values of 7-11 eV angstrom. We present band dispersion measurements of MAPbBr(3) and spin-resolved photoemission of CsPbBr3 to show that a large Rashba effect detectable by photoemission or circular dichroism does not exist and cannot be the origin of the high effciency.
| Author details: | Maryam SajediORCiDGND, Maxim KrivenkovORCiDGND, Dmitry MarchenkoORCiDGND, Andrei VarykhalovORCiDGND, Jaime Sanchez-BarrigaORCiDGND, Emile D. L. RienksORCiD, Oliver RaderORCiDGND |
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| DOI: | https://doi.org/10.1103/PhysRevB.102.081116 |
| ISSN: | 2469-9950 |
| ISSN: | 2469-9969 |
| Title of parent work (English): | Physical review : B, Condensed matter and materials physics |
| Publisher: | American Institute of Physics; American Physical Society (APS) |
| Place of publishing: | Woodbury, NY |
| Publication type: | Article |
| Language: | English |
| Date of first publication: | 2020/08/21 |
| Publication year: | 2020 |
| Release date: | 2023/07/07 |
| Volume: | 102 |
| Issue: | 8 |
| Article number: | 081116 |
| Number of pages: | 6 |
| Funding institution: | Helmholtz Association (Impuls-und Vernetzungsfonds der; Helmholtz-Gemeinschaft) [HRSF-0067] |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Peer review: | Referiert |
