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. [...]
RECONSTRUCTED FERMI SURFACE IN THE CHARGE-DENSITY-WAVE STATE OF TiSe2
Owen Moulding and Sven Friedemann, University of Bristol. TiSe2 features a charge density wave (CDW) driven by condensation of excitons, i.e., pairs of electrons and holes, alongside electronphonon coupling. The CDW transition at 202 K gaps out most of [...]
ORIGIN OF THE LARGE UPPER CRITICAL FIELD OF A STOICHIOMETRIC IRON-BASED SUPERCONDUCTOR, CaKFe4As4
Matthew Bristow, Amalia Coldea, University of Oxford and William Knafo, LNCMI-Toulouse. CaKFe4As4 belongs to a new family of 1144 iron-based superconductors. It is a clean and stoichiometric superconductor with a relatively high critical temperature of 35 K. This system [...]