Alessandro Surrente, Wroclaw University of Science and Technology, Paulina Plochocka, Wroclaw University of Science and Technology and LNCMI Toulouse. The synthesis of colloidal nanocrystals with near-unity photoluminescence (PL) quantum yields has vastly extended the potential of metal-halide perovskites for solid-state lighting and display applications. It is possible to template the [...]

Elena Blundo, Antonio Polimeni, Sapienza University of Rome, Adam Babiński, University of Warsaw, and Peter Christianen, HFML Nijmegen Strain plays an important role in two-dimensional (2D) semiconductors. Thanks to their all-surface nature, these 2D materials feature an extraordinary capability to bear mechanical deformations without fracturing. This resilience to stress reveals [...]

J. Chang, Zürich University, M. Ichioka, Okayama University, D. Campbell, D. Le Boeuf, LNCMI Grenoble. In the physics of correlated electron systems, van Hove singularities play a key role. These are points in the band structure where the density of states is singular. When the Fermi level is tuned towards [...]

Denis Gorbunov, HLD Dresden. Optical excitations in solids require conservation of momentum and energy. This applies also to magnetic excitations, when a magnon with a given momentum and energy is created / annihilated by absorbing / emitting a photon. The small photon momentum typically confines possible excitations close to the [...]

Vincent Oliviero, David Vignolles, Cyril Proust, LNCMI Toulouse. In the last few years, high-magnetic-field studies have allowed great breakthroughs in the understanding of the physics of high-Tc cuprate superconductors. Here, we report the measurements of quantum oscillations and Hall effect in high magnetic fields up to 88 T in the [...]

Jan Wyzula, Milan Orlita, LNCMI-CNRS Grenoble and Mark O. Goerbig, LPS-CNRS Orsay Ever since the advent of graphene and topological materials, relativistic physics has become an integral part of condensed-matter sciences. While emergent, it is important to stress that this type of relativity is pertinent beyond the dispersion of the [...]

Peter Christianen, HFML Nijmegen. The development of pulsed, high-intensity terahertz free-electron lasers (FELs) has enabled the investigation of nonlinear phenomena in molecules and solids in the terahertz regime. To expand their potential, recently THz FELs were combined with high magnetic fields in some laboratories around the world. At HFML-FELIX, researchers [...]

Yurii Skourski, HLD Dresden. A group of researchers from Korea, USA, and HLD have demonstrated that topological nodal-line degeneracy of spin-polarized bands in magnetic semiconductors can induce an extremely large angular dependence in the magnetotransport. A phenomenon that the researcher called colossal angular magnetoresistance. The findings demonstrate that magnetic nodal-line [...]

Mateusz Dyksik, Wroclaw University of Science and Technology, Poland and Paulina Plochocka, LNCMI Toulouse. Optically inactive dark exciton states play an important role in light-emission processes in semiconductors because they provide an efficient nonradiative recombination channel. Understanding the exciton fine structure in materials with potential applications in light-emitting devices is, [...]

Jasper Linnartz and Steffen Wiedmann, HFML Nijmegen. A team of researchers from HFML-FELIX, Aarhus University, and the University of Bristol has investigated the high-field electronic transport properties of the semimetal WTe2. In quantum-oscillations measurements, they revealed peculiar magnetic-breakdown trajectories of charge carriers between nested pockets of the Fermi surface. WTe2 [...]