APERIODIC QUANTUM OSCILLATIONS IN THE TWO-DIMENSIONAL ELECTRON GAS AT THE LaAlO3/SrTiO3 INTERFACE
Walter Escoffier, Michel Goiran, LNCMI Toulouse and Km Rubi, HFML Nijmegen. The discovery of a two-dimensional electron gas (2DEG) at the interface between the two insulators LaAlO3 (LAO) and SrTiO3 (STO) has not only enhanced the expectations of oxide-electronics [...]
NMR STUDY OF CHARGE-DENSITY WAVES UNDER HYDROSTATIC PRESSURE IN YBa2Cu3Oy
Igor Vinograd and Marc-Henri Julien, LNCMI-Grenoble. High-temperature superconductivity in the cuprates arises in close proximity to a charge density wave (CDW) phase. A challenge in the field is to understand how both phenomena compete and whether, behind pure competition, [...]
THREADING FLUX THROUGH HELIXES
Rosa Córdoba, ICMol and Uli Zeitler, HFML Nijmegen. The fabrication and understanding of complex three-dimensional (3D) architectures on the nanoscale is one of the promising routes towards new schemes for a next generation of advanced electronic devices. This endeavor [...]
MAGNETIC SHAPE MEMORY EFFECTS AND MAGNETO-STRUCTURAL COUPLING IN Fe1+yTe
S. Rößler, S. Wirth, MPI CPfS Dresden and Y. Skourski, HLD Dresden In recent years, the iron chalcogenides received considerable attention in the condensed-matter physics community which was mainly sparked by the discovery of superconductivity below Tc ≈ 8.5 [...]
PHASE-TRANSITION-INDUCED CARRIERMASS ENHANCEMENT IN 2D RUDDLESDEN− POPPER PEROVSKITES
Michal Baranowski and Paulina Plochocka, LNCMI-Toulouse Organic-inorganic halide perovskites have become the “next big thing” in emerging semiconductor materials, with their unprecedented rapid development and successful application in high-performance photovoltaics. Yet, their inherent instabilities with respect to moisture remain [...]
NEGATIVE THERMAL EXPANSION IN A MAGNETICALLY FRUSTRATED SPINEL
Lisa Rossi and Ben Bryant, HFML Nijmegen Frustrated magnets are materials with competing spin interactions, which cannot be simultaneously satisfied. While these materials have become most famous as a playground for novel phases, such as quantum spin liquids, they [...]
CYCLOTRON EMISSION FROM MASSLESS KANE ELECTRONS
Milan Orlita, LNCMI-Grenoble. When a magnetic field is applied to a solid, the continuous density of electronic states transforms into a set of discrete energy levels, known as Landau levels. Electrons excited in such a ladder may recombine, with [...]
UNCOVERING THE MICROSCOPIC NATURE OF THE FIELD-INDUCED PHASE TRANSITION IN HoFe5Al7
Denis Gorbunov, HLD Dresden. Intermetallic compounds based on 3d and 4f elements combine high magnetic ordering temperatures, typical of 3d metals, and the large magnetic anisotropy of the magnetic rare-earths elements. The application of external magnetic fields tunes the [...]
MAGNETIC-FIELD-INDUCED METAMAGNETISM AND REENTRANT SUPERCONDUCTIVITY IN THE HEAVY-FERMION SUPERCONDUCTOR UTe2
William Knafo, Marc Nardone (LNCMI Toulouse), Sanu Mishra (LNCMI Grenoble) and Georg Knebel (CEA-Grenoble). Following the recent discovery of superconductivity in the heavy-fermion paramagnet UTe2, which is suspected to lie on the verge of ferromagnetism [S. Ran et al., [...]
ELECTRICAL RESISTIVITY ACROSS A NEMATIC QUANTUM CRITICAL POINT
Nigel Hussey, HFML Nijmegen. It is not only elemental or ordinary metals that superconduct. Today, scientists are also fascinated by strange metals that undergo phase transitions (e.g. to a magnetic state) before superconductivity sets in. If they find the [...]