Fig. 4: Rashba splitting revealed by two-photon photoluminescence excitation (TP-PLE) on exfoliated ferroelectric (BA)2(MA)Pb2Br7 (n = 2) film with and without striped domains. | Nature Communications

Fig. 4: Rashba splitting revealed by two-photon photoluminescence excitation (TP-PLE) on exfoliated ferroelectric (BA)2(MA)Pb2Br7 (n = 2) film with and without striped domains.

From: Switchable planar chirality and spin texture in highly ordered ferroelectric hybrid perovskite domains

Fig. 4

a One-photon PL emission spectrum acquired on the surface of n = 2 Br-RPP film. b TP-PLE spectra of n = 2 Br-RPP film in three different regions: a domain-free area, domain A and domain B, as indicated by the respective inlet images. The positions of the exciton energy (EX), Rashba splitting energy (4ER) and energy of maximum PL intensity (EMax) are designated on the spectra.

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