Stefan Wilfert

TL;DR: In this paper, the existence of one-dimensional (1D) midgap states at odd-atomic surface step edges of the three-dimensional topological crystalline insulator (Pb,Sn)Se was uncovered using scanning tunneling spectroscopy.

TL;DR: It is demonstrated that magnetic order and gapless states can coexist, and this is the result of the delicate balance between two opposite trends, that is, gap opening and emergence of a Dirac node impurity band, both induced by the magnetic dopants.

TL;DR: In this paper, the existence of one-dimensional (1D) midgap states at odd-atomic surface step edges of the three-dimensional topological crystalline insulator (Pb,Sn)Se was uncovered using scanning tunneling spectroscopy.

TL;DR: In this article, the authors show that the formation of a surface-near impurity depletion zone is inhibited by the very high diffusivity of oxygen in the Nb host crystal which kicks in at annealing temperatures as low as a few hundred degree Celsius.

TL;DR: In this article, the authors analyzed the interdependence of Kondo screening and superconductivity and showed that the coupling and the resulting YSR states are strongly adsorption site-dependent and reveal a quantum phase transition at a Kondo temperature comparable to the superconducting gap.