Photo (©) Radboud Universiteit/Dick van Aalst
HIGH-ANGULAR MOMENTUM EXCITATIONS IN THE COLLINEAR ANTIFERROMAGNET FePS3
Jan Wyzula and Milan Orlita, University of Fribourg and LNCMI Grenoble. Magnons, or quantized spin waves, are collective magnetic excitations in solids. These boson-like quasiparticles disperse with lattice momentum k, [...]
DIMENSIONAL REDUCTION AND INCOMMENSURATE DYNAMIC CORRELATIONS IN A TRIANGULAR-LATTICE ANTIFERROMAGNET
Sergei Zvyagin, HLD Dresden. Antiferromagnetic materials with spin 1/2 and triangular-lattice structures are in the focus of modern quantum physics, in particular, in connection with Anderson’s idea of “resonating valence [...]
INFLUENCE OF HIGH MAGNETIC FIELDS ON ELECTRONS UNDERGOING PLANCKIAN DISSIPATION
Amirreza Ataei and Louis Taillefer, Université de Sherbrooke, Canada, Cyril Proust and David Vignolles, LNCMI-Toulouse. In certain materials called “strange metals”, the electrical resistivity follows a perfectly linear temperature dependence [...]
HIGH-PRESSURE TUNING OF MAGNON-POLARONS IN THE LAYERED ANTIFERROMAGNET FePS3
Amit Pawbake and Clément Faugeras, LNCMI Grenoble. Spin waves (magnons) in magnetically ordered solids – ferromagnets or antiferromagnets – are collective excitations of an ensemble of spins. They propagate in [...]
PREDOMINANCE OF ELECTRON-PHONON SCATTERING IN THE ROOM-TEMPERATURE QUANTUM HALL EFFECT IN GRAPHENE
Uli Zeitler, Steffen Wiedmann, HFML Nijmegen and Sergio Pezzini, Istituto Nanoscienze-CNR Pisa. The quantum Hall effect (QHE), a paradigmatic phenomenon of twodimensional (2D) electron systems in high magnetic fields, typically [...]
MAGNETOCALORIC MATERIALS FOR THE LIQUEFACTION OF HYDROGEN
Tino Gottschall, HLD Dresden. We are witnessing a great transition towards a society powered by renewable energies to meet the ever-stringent climate target. Hydrogen, as an energy carrier, will play [...]
MAGNETICALLY BRIGHTENED DARK EXCITONS IN TWO-DIMENSIONAL METAL-HALIDE PEROVSKITES
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 [...]
HIGH MAGNETIC FIELDS UNVEIL STRAININDUCED EXCITON HYBRIDIZATION IN 2D CRYSTALS
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 [...]
EVIDENCE FOR A SQUARE-SQUARE VORTEX-LATTICE TRANSITION IN A HIGH-Tc CUPRATE SUPERCONDUCTOR
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 [...]
MAGNON EXCITATIONS STUDIED OVER THE ENTIRE BRILLOUIN ZONE BY THz MAGNETOMETRY
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 [...]