TY  - JOUR
A1  - Sajedi, Maryam
A1  - Krivenkov, Maxim
A1  - Marchenko, Dmitry
A1  - Varykhalov, Andrei
A1  - Sanchez-Barriga, Jaime
A1  - Rienks, Emile D. L.
A1  - Rader, Oliver
T1  - Absence of a giant Rashba effect in the valence band of lead halide perovskites
T2  - Physical review : B, Condensed matter and materials physics
N2  - 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.
Y1  - 2020
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/59831
SN  - 2469-9950
SN  - 2469-9969
VL  - 102
IS  - 8
PB  - American Institute of Physics; American Physical Society (APS)
CY  - Woodbury, NY
ER  -