Dynamic response and electronic structure of potassium doped picene investigated by electron energy-loss spectroscopy

Abstract

We performed electron energy-loss spectroscopy studies in order to get a deeper insight into the electronic properties of potassium intercalated picene, a recently discovered superconductor. A comparison of the loss function of the undoped and doped compound shows the appearance of a new peak in the optical gap, which we attribute to the charge carrier plasmon. We find a dramatic increase for the value of the background dielectric constant ${\epsilon }_{\infty }$ upon doping. Our core level excitation data clearly signal filling of the conduction bands with electrons upon potassium addition.

13 pages, 5 figures

References in corpus (4)

• Electronic transport through electron-doped Metal-Phthalocyanine Materials
• Electronic properties of molecular solids: the peculiar case of solid Picene
• Electronic structure of pristine and K-doped solid picene: Non-rigid-band change and its implication for electron-intramolecular-vibration interaction
• Evidence for the formation of a Mott state in potassium-intercalated pentacene

Cited by in corpus (1)

• Vibrational spectrum and electron-phonon coupling of doped solid picene from first principles