212 citations · 316 across the 4 of their papers we have counts for
4 papers
Even-odd effects in NSN scattering problems: Application to graphene nanoribbons
François Crépin, Hans Hettmansperger, Patrik Recher +1
We study crossed Andreev reflection (CAR) of electrons or holes in normal metal-superconductor-normal metal junctions and highlight some very strong effects of the underlying latti…
Quantum Hall effect in narrow graphene ribbons
H. Hettmansperger, F. Duerr, J. B. Oostinga +3
The edge states in the integer quantum Hall effect are known to be significantly affected by electrostatic interactions leading to the formation of compressible and incompressible…
Phenomenological Consequences of sub-leading Terms in See-Saw Formulas
Hans Hettmansperger, Manfred Lindner, Werner Rodejohann
Several aspects of next-to-leading (NLO) order corrections to see-saw formulas are discussed and phenomenologically relevant situations are identified. We generalize the formalism…
keV sterile neutrino dark matter in gauge extensions of the standard model
F. Bezrukov, H. Hettmansperger, M. Lindner
It is known that a keV scale sterile neutrino is a good warm dark matter candidate. We study how this possibility could be realized in the context of gauge extensions of the standa…