J
J. Schäfer
Researcher at University of Erlangen-Nuremberg
Publications - 38
Citations - 1892
J. Schäfer is an academic researcher from University of Erlangen-Nuremberg. The author has contributed to research in topics: Fermi level & Pseudogap. The author has an hindex of 17, co-authored 35 publications receiving 1513 citations. Previous affiliations of J. Schäfer include University of Würzburg & Lawrence Berkeley National Laboratory.
Papers
More filters
Journal ArticleDOI
Bismuthene on a SiC substrate: A candidate for a high-temperature quantum spin Hall material
Felix Reis,Gang Li,Gang Li,Lenart Dudy,Maximilian Bauernfeind,Stefan Glass,Werner Hanke,Ronny Thomale,J. Schäfer,Ralph Claessen +9 more
TL;DR: The combined theoretical and experimental results demonstrate a concept for a quantum spin Hall wide-gap scenario, where the chemical potential resides in the global system gap, ensuring robust edge conductance.
Journal ArticleDOI
Atomically controlled quantum chains hosting a Tomonaga-Luttinger liquid
C. Blumenstein,J. Schäfer,S. Mietke,S. Meyer,A. Dollinger,M. Lochner,M. Lochner,Xiaoyu Cui,L. Patthey,René Matzdorf,Ralph Claessen +10 more
TL;DR: The Tomonaga-Luttinger liquid model is the leading candidate for describing one-dimensional metallic conductors at low temperature as discussed by the authors, but experimental evidence that it is valid is sketchy.
Journal ArticleDOI
Photoemission study of amorphous carbon modifications and comparison with calculated densities of states
J. Schäfer,Jürgen Ristein,Ralf Graupner,Lothar Ley,U. Stephan,Th. Frauenheim,V.S. Veerasamy,Gehan A. J. Amaratunga,M. Weiler,H. Ehrhardt +9 more
TL;DR: The electronic density of states is fitted to the data using photoemission cross sections and a model for the lifetime broadening and confirms the validity of the predicted structures that do not possess any significant larger \ensuremath{\pi} clusters.
Journal ArticleDOI
Electronic quasiparticle renormalization on the spin wave energy scale.
TL;DR: The self-energy behavior of the iron surface gives spectroscopic evidence of a quasiparticle mass enhancement due to electron-magnon coupling, and is in striking coincidence with that of the spin wave spectrum in iron.
Journal ArticleDOI
Effective correlation energies for defects in a-C:H from a comparison of photelectron yield and electron spin resonance experiments
J. Ristein,J. Schäfer,Lothar Ley +2 more
TL;DR: Amorphous hydrogenated carbon films were characterized by IR and optical spectroscopy, confirming a transition from polymer-like to diamond-like (DLC) material with increasing self bias as mentioned in this paper.