Research highlights
Using low-temperature high-field magneto-transport experiments up to 35 Tesla, scientists from RWTH Aachen University in collaboration with HFML-EMFL researchers have succeeded to observe the FQHE in CVD-grown graphene
27 October 2020
Researchers from the HMFL have determined the shape of the low-energy electronic structure – or Fermi surface – of the Dirac nodal line semimetal ZrSiS with unprecedented accuracy. Due to the peculiar cage-like shape of the Fermi surface, the electron states are able to tunnel between adjacent disconnected parts of the Fermi surface, effectively causing the individual nodal lines to form a closed loop. These findings pave the way for future research that will focus on tuning the fascinating electronic properties in this class of materials.
11 July 2020
Unsustainable demands on the world’s energy and material resources raise the call for practical solutions, and nanosciences have their part to play. For instance, separation of solids according to density are enabled by colloidal dispersions of superparamagnetic nanoparticles. This is of great interest in the recycling of mixed waste. Still large-scale use remain a challenge, as you would need very strong magnets ánd magnetic ferrofluids that remains stable.”as you would need very strong magnets ánd magnetic ferrofluids that remains stable. Researchers from HFML and Utrecht University have found ferrofluids that remain stable at high fields, and proved that stability at moderate fields is predictive of stability at much higher fields. This facilitates the development of new ferrofluids dedicated to magnetic density separation
10 July 2020
A team of scientists investigated the iron-based superconductor FeSe at HFML and found compelling evidence of a distinct high-field superconducting phase which is separated from the usual superconducting phase via a first-order phase transition. The research, carried out as part of an international collaboration involving Japanese and German researchers and two EMFL laboratories, was published in the journal Physical Review Letters.
8 May 2020
Bioassembly on a surface (“scaffold”) has several disadvantages. An alternative is magnetic levitational bioassembly. Levitation using permanent magnets is only possible in a toxic concentration of a paramagnetic salt solution. Researchers from Russia and HFML-FELIX now report that magnetic levitational bioassembly with a non-toxic, low concentration of a paramagnetic medium in high magnetic field is technologically feasible.
23 March 2020
A team of researchers from Zaragoza, Paris, Madrid, Dresden and Nijmegen have investigated the superconducting properties of 3D tungsten carbide nan helices. The peculiar superconducting properties of novel nanostructures may pave the way towards promising new device applications and such as sensors, energy storage elements, and nano-antennas.
20 January 2020
New research at HFML has discovered a previously unknown feature of certain metals which, when cooled close to absolute zero, undergo a quantum-mechanically-driven phase transition. The research, carried out as part of an international collaboration involving American and Japanese researchers, was published in the new journal Physical Review Research.
18 November 2019
Materials usually expand when heated and contract when cooled. As part of an international effort, researchers at the Okinawa Institute of Science and Technology Graduate University (OIST) have found the key to a material that behaves in the opposite way — a property that could be exploited in future technologies.
28 July 2019
It took Nigel Hussey and his team 10 years to finally solve the mystery of the upturn of the electrical resistance at low temperatures in an exotic metal known as purple bronze, a puzzle that had foxed researchers for more than three decades.
7 July 2019
This study reveals that replica Dirac particles form field-induced insulating states with an energy gap for both the bulk and edge excitations. It opens the possibility of using magnetic fields on engineered two-dimensional superlattices to create Dirac fermions with on-demand Fermi velocity and gap size.
20 May 2019