TY  - JOUR
A1  - Sajedi, Maryam
A1  - Krivenkov, Maxim
A1  - Marchenko, Dmitry
A1  - Sanchez-Barriga, Jaime
A1  - Chandran, Anoop K.
A1  - Varykhalov, Andrei
A1  - Rienks, Emile D. L.
A1  - Aguilera, Irene
A1  - Blügel, Stefan
A1  - Rader, Oliver
T1  - Is there a polaron signature in Angle-Resolved Photoemission of CsPbBr3?
T2  - Physical review letters
N2  - 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 similar effective masses at the valence band maximum of 0.203 1 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 largepolaron formation cannot be concluded from photoemission data.
Y1  - 2022
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/64039
SN  - 0031-9007
SN  - 1079-7114
VL  - 128
IS  - 17
PB  - American Physical Society
CY  - College Park
ER  -