Is There a Polaron Signature in Angle Resolved Photoemission of CsPbBr3?
| العنوان: | Is There a Polaron Signature in Angle Resolved Photoemission of CsPbBr3? |
|---|---|
| المؤلفون: | Maryam Sajedi, Maxim Krivenkov, Dmitry Marchenko, Jaime Sánchez-Barriga, Anoop K. Chandran, Andrei Varykhalov, Emile D. L. Rienks, Irene Aguilera, Stefan Blügel, Oliver Rader |
| المصدر: | Physical review letters 128(17), 176405 (2022). doi:10.1103/PhysRevLett.128.176405 |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, General Physics and Astronomy, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, ddc:530, polarons, lead halide perovskites |
| الوصف: | The formation of large polarons has been proposed as reason for the high defect tolerance, low mobility, low charge carrier trapping and low nonradiative recombination rates of lead halide perovskites. Recently, direct evidence for large-polaron formation has been reported from a 50% effective mass enhancement in angle-resolved photoemission of CsPbBr3 over theory for the orthorhombic structure. We present in-depth band dispersion measurements of CsPbBr3 and GW calculations which lead to almost identical effective masses at the valence band maximum of 0.203+/-0.016 m0 in experiment and 0.226 m0 in orthorhombic theory. We argue that the effective mass can be explained solely on the basis of electron-electron correlation and large-polaron formation cannot be concluded from photoemission data. Comment: Version 2 contains more precise theoretical values and supplemental material |
| وصف الملف: | application/pdf |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d120030b388df476a0788c443afcf36 http://www.helmholtz-berlin.de/pubbin/oai_publication?VT=1&ID=107773 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....4d120030b388df476a0788c443afcf36 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |