37 citations · 53 across the 5 of their papers we have counts for
5 papers
Organic Molecules on Wide-Gap Insulators: Electronic Excitations
Wei Chen, Christoph Tegenkamp, Herbert Pfnür
The electronic excitation of a conjugated molecule-insulator interface, as exemplified by the adsorption of benzoic acid and its phenolic derivative on NaCl(001) surface, is addres…
Monopole and multipole plasmons in a two-dimensional system
H. Pfnür, T. Langer, J. Baringhaus +1
Using monolayer graphene as a model system for a purely two-dimensional (2D) electron gas, we show by energy electron loss spectroscopy, highly resolved both in energy and momentum…
Plasmon electron-hole resonance in epitaxial graphene
C. Tegenkamp, H. Pfnuer, T. Langer +2
The quasiparticle dynamics of the sheet plasmons in epitaxially grown graphene layers on SiC(0001) have been studied systematically as a function of temperature, intrinsic defects,…
Color centers in NaCl by hybrid functionals
Wei Chen, Christoph Tegenkamp, Herbert Pfnür +1
We present in this work the electronic structure and transition energies (both thermodynamic and optical) of Cl vacancies in NaCl by hybrid density functionals. The underestimated…
Anomalous molecular orbital variation upon adsorption on wide band gap insulator
Wei Chen, Christoph Tegenkamp, Herbert Pfnür +1
It is commonly believed that organic molecules are physisorbed on the ideal non-polar surfaces of wide band gap insulators with limited variation of the electronic properties of th…