TUNING THE EXCITONIC PROPERTIES OF A TWO-DIMENSIONAL PEROVSKITE FAMILY VIA QUANTUM CONFINEMENT
Mateusz Dyksik, Wrocław University of Science and Technology and Paulina Plochocka, LNCMI Toulouse. Two-dimensional (2D) metal-halide perovskites constitute an important step in the evolution of low-cost organic-inorganic hybrid light absorbers and emitters. Similar to their 3D counterparts, layered perovskites show [...]
REDUCED HALL CARRIER DENSITY ACROSS THE STRANGE METAL PHASE OF CUPRATES
Nigel Hussey, HFML and Anthony Carrington, University of Bristol. Researchers from the UK and Japan, together with scientists from three of the EMFL laboratories, have uncovered a striking crossover in the Hall resistivity across the so-called strange-metal phase of overdoped [...]
ROBUST FERMI-SURFACE TOPOLOGY OF CeRhIn5 IN HIGH MAGNETIC FIELDS
Sanu Mishra and Ilya Sheikin, LNCMI Grenoble, Tobias Förster, HLD Dresden, and Alix McCollam, HFML Nijmegen. Rare-earth-based materials are now widely recognized as an ideal playground for exploration of the fascinating physics that develops around a quantum critical point (QCP). [...]
PRESSURE DEPENDENCE OF HIGH-FIELD NEMATICITY AND MAGNETISM IN CeRhIn5
Toni Helm, HLD Dresden. Strongly correlated electron materials, in particular heavy-fermion compounds, offer a huge playground for research on fundamental concepts in condensed-matter physics. The antiferromagnetic (AFM) metal CeRhIn5 provides a textbook example of quantum criticality in a heavy-fermion system: [...]
BROAD TUNABILITY OF CARRIER EFFECTIVE MASSES IN TWO-DIMENSIONAL HALIDE PEROVSKITES
Mateusz Dyksik, Wroclaw University and Paulina Plochocka, LNCMI-Toulouse. Two-dimensional organic-inorganic halide perovskites have generated tremendous interest in the field of optoelectronics for applications in low-cost and efficient light absorbers and emitters. Similar to their three-dimensional (3D) ancestors, the layered [...]
HIDDEN MAGNETISM AT THE PSEUDOGAP CRITICAL POINT OF A CUPRATE SUPERCONDUCTOR
David Leboeuf and Marc-Henri Julien, LNCMI-Grenoble. Extensive studies of cuprate superconductors have shown that, after three-dimensional Néel order disappears upon hole doping (p), there are still remnants of spin order at low temperature in the form of a glass-like [...]
FRACTIONAL QUANTUM HALL EFFECT IN CVD GRAPHENE
Uli Zeitler, HFML Nijmegen. The fractional quantum Hall effect (FQHE), observed in low-temperature magnetotransport experiments in two-dimensional (2D) electron systems and caused by the electron-electron interaction, can be regarded as an ultimate proof of device quality in terms of quantum [...]
NATURE OF MAGNETIC EXCITATIONS IN THE HIGH-FIELD PHASE OF α-RuCl3
Sergei Zvyagin, HLD Dresden. Spin systems with honeycomb structures are attracting a great deal of attention, in particular in connection with the famous Kitaev-Heisenberg model. This model predicts a variety of magnetic phases, ranging from the conventional Néel state [...]
SQUEEZING OUT FIELD-INDUCED REENTRANT HIDDEN-ORDER IN URu2Si2
William Knafo, LNCMI-Toulouse, Shingo Araki, Okayama University, and Daniel Braithwaite, CEA-Grenoble. The mystery of the hidden-order (HO) phase in the correlated electron paramagnet URu2Si2 is still unsolved. To address this problem, one strategy is to search for clues in [...]
BEYOND THE CONICAL BAND APPROXIMATION OF A WEYL SEMIMETAL
A. Akrap, University of Fribourg, A. V. Pronin, Universität Stuttgart, and M. Orlita, LNCMI-Grenoble. Experiments have demonstrated many gapless electronic phases with conical bands. These phases exist within diverse classes of systems comprising graphene and many different topological materials. [...]