Y. Tokunaga, Japan Atomic Energy Agency, Tokai, Japan, M. Horvatić and Steffen Krämer, LNCMI Grenoble. The uranium-based superconductor UTe2 provides an attractive platform for studying the novel physics of spin-triplet and topological superconductivity in bulk materials. Resistivity measurements performed in 2019 at LNCMI, both in continuous and pulsed fields, revealed that [...]
Maurice Bal, HFML Nijmegen. Since its discovery in 1980 by von Klitzing et al., the quantum Hall effect (QHE) has been measured in many different 2D systems, mainly at cryogenic temperatures. Currently, graphene is the only material that displays the QHE at room temperature (RT). Considering that the robustness of [...]
Toni Helm, HLD. The recent discovery of superconductivity (SC) in the heavy-fermion metal UTe2 with a critical temperature of about 2 K triggered much excitement, as its critical field reaches values approaching those of high-Tc superconductors. Moreover, UTe2 appeared very quickly as a potential candidate for topological spin-triplet SC that [...]
Z. Yang, Y. Kohama, ISSP, University of Tokyo, Japan and D. K. Maude, LNCMI Toulouse. We have investigated quantum oscillations in the electronic specific heat, Cel, in natural graphite. The crossing of a single spin Landau level at the Fermi energy gives rise to a double-peak structure (Figure 1a). Crucially, [...]
Adrien Rosuel, Christophe Marcenat, Georg Knebel, Jean-Pascal Brison, Phéliqs Grenoble, Thierry Klein, Institut Néel, Grenoble, Dai Aoki, Tohoku University, Albin Demuer, and Gabriel Seyfarth, LNCMI-Grenoble. The discovery that superconductivity can also be induced by direct interactions between electrons, for example mediated by their magnetic properties, was a real breakthrough. However, [...]
Sandra Kleuskens, HFML Nijmegen and IMM Radboud, Daniela Wilson, IMM Radboud, and Hans Engelkamp, HFML Nijmegen. Researchers of HFML-FELIX and the Radboud University have determined the magnetic anisotropy of polystyrene in poly-ethyleneglycol polystyrene polymersomes by magnetic birefringence and transmission electron microscopy. The magnetic anisotropy found is only a small fraction [...]
Tommy Kotte, HLD. The conventional classification of magnetic materials has long been based on their distinction as either ferromagnetic or antiferromagnetic, determined by the presence or absence of a discernible net magnetic moment. In the ferromagnetic state, the break of timereversal symmetry, coupled with spontaneous spin polarization in the electronic [...]
Simon Tardieu, Florence Lecouturier-Dupouy, LNCMI Toulouse, and Christophe Laurent, Université de Toulouse. The generation of record pulsed magnetic fields above 100 T requires the use of coils wound with low-resistivity wires in order to limit the heating, and with a very high mechanical strength in order to be able to [...]
D. Santos-Cottin, University of Fribourg, Milan Orlita, LNCMI-Grenoble and Ana Akrap, University of Fribourg. Weyl semimetals are an exciting new group of materials, showing unique signatures in their transport and optical behavior, inherited from their distinct topological features. The presence of nodes in the electronic band structure of Weyl semimetals [...]
P. Chudzinski, M. Berben, Queen’s University Belfast, UK, and N. E. Hussey, HFML-FELIX. A team of researchers from HFML-FELIX, UK, USA, and China have discovered a rare phenomenon known as “emergent symmetry” in Li0,9Mo6O17(LMO). At room temperature, LMO is a 1D metal (Tomonaga-Luttinger liquid or TLL). As it cools down, [...]