Roth, Friedrich; Mahns, Benjamin; Hampel, Silke; Nohr, … - In: The European Physical Journal B - Condensed Matter and … 86 (2013) 2, pp. 1-5
We have examined the singlet excitons in two representatives of acene-type (tetracene and pentacene) and phenacene-type (chrysene and picene) molecular crystals, respectively, using electron energy-loss spectroscopy at low temperatures. We show that the excitation spectra of the two hydrocarbon...