Publications (94)
Stability of the Weyl-semimetal phase on the pyrochlore lattice
Christoph Berke, Paolo Michetti, Carsten Timm
Motivated by the proposal of a Weyl-semimetal phase in pyrochlore iridates, we consider a Hubbard-type model on the pyrochlore lattice. To shed light on the question as to why such…
Negative longitudinal magnetoconductance at weak fields in Weyl semimetals
Andy Knoll, Carsten Timm, Tobias Meng
Weyl semimetals are topological materials that provide a condensed-matter realization of the chiral anomaly. A positive longitudinal magnetoconductance quadratic in magnetic field…
Edge currents as a signature of flat bands in topological superconductors
Andreas P. Schnyder, Carsten Timm, P. M. R. Brydon
We study nondegenerate flat bands at the surfaces of noncentrosymmetric topological superconductors by exact diagonalization of Bogoliubov-de Gennes Hamiltonians. We show that thes…
Cotunneling and non-equilibrium magnetization in magnetic molecular monolayers
Florian Elste, Carsten Timm
Transport and non-equilibrium magnetization in monolayers of magnetic molecules subject to a bias voltage are considered. We apply a master-equation approach going beyond the seque…
Irreducible momentum-space spin structure of Weyl semimetals and its signatures in Friedel oscillations
Andy Knoll, Carsten Timm
Materials that break time-reversal or inversion symmetry possess nondegenerate electronic bands, which can touch at so-called Weyl points. The spinor eigenstates in the vicinity of…
Microscopic coexistence of superconductivity and magnetism in Ca1-xNaxFe2As2
Philipp Materne, Sirko Kamusella, Rajib Sarkar +9
We present a detailed investigation of the magnetic and superconducting properties of Ca1-xNaxFe2As2 single crystals with x = 0.00, 0.35, 0.50, and 0.67 by means of the local probe…