Erik van Heumen

TL;DR: In this article, it was shown that the near-nodal excitations of underdoped cuprates obey Fermi liquid behavior, where the lifetime τ(ω, T) of a quasiparticle depends on its energy ω as well as on the temperature T.

TL;DR: In this paper, the authors present infrared spectra 0.1 − 1 eV of electrostatically gated bilayer graphene as a function of doping and compare it with tight-binding calculations.

TL;DR: N nanoscale phase-sensitive junction technology is utilized to induce superconductivity in the Dirac semimetal Bi1−xSbx via the proximity effect and shows that a magnetic field applied in the plane of the junction allows tuning of the Josephson junctions from 0 to π regimes.

TL;DR: In this paper, phase-sensitive junction technology is used to induce superconductivity in a Dirac semimetal and radio frequency irradiation experiments reveal a significant contribution of 4$\pi$-periodic Andreev bound states to the supercurrent in Nb-Bi${0.97}$Sb$_{0.03}$-Nb Josephson junctions.

TL;DR: Low energy electron diffraction experiments, LEED simulations, and finite slab density functional calculations are combined to study the cleavage surface of Co doped BaFe(2-x)Co(x)As2 to demonstrate that the energy dependence of the LEED data can only be understood from a terminating 1/2 Ba layer accompanied by distortions of the underlying As-Fe2-As block.