Complex momentum behavior of electronic excitations in β-CuPc.
作者： Marco Naumann , Martin Knupfer
DOI: 10.1063/1.5046388
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摘要: The electronic excitation spectrum of β-CuPc has been investigated using electron energy-loss spectroscopy in transmission. Our results demonstrate a rather strong momentum dependence the lowest exciton features. Both main components show negative dispersion, and indicates that this dispersion is parallel to molecular stacks β-CuPc. In addition, spectral shape also varies upon increasing transfer indicating particular inter-molecular interactions.
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