Fig. 1: Optical and magnetic characterization of Mn:PEPI.
a Sketch of the Ruddlesden–Popper quantum well structure with two possible Mn sites: substitutional for the divalent anion and interstitial in the organic barrier. b Circularly polarized optical transmission at 4 K with the magnetic field. The bright exciton and corresponding phonon replica are denoted XB, XB‘, XB”, respectively. c Electron paramagnetic resonance response of drop casted material at 4 K. Stars denote the six hyperfine transitions. d SQUID magnetization versus field sweep at different temperatures. The data shows that Mn2+ ions are present in the crystal structure and give rise to paramagnetism without inducing additional optically active trap states.
