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

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

2011-02-16

arxiv.org/abs/1102.3286v1

Phys. Rev. B 83, 144501 (2011)

Physics

Condensed Matter

Superconductivity

13 pages, 5 figures

Scientific paper

10.1103/PhysRevB.83.144501

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.

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