This year's speakers
Dr. Alix McCollam (Radboud University)
Alix McCollam received her PhD in experimental condensed matter physics from the University of Cambridge, UK, and then worked as a postdoc at the University of Toronto before moving to the HFML in Nijmegen, where she is now Assistant Professor. Her research focuses on understanding quantum phases of matter, especially magnetic and electronic properties that arise due to strong interactions between electrons.
Atom-by-atom engeneering of electronic states of matter
Prof. Dr. Cristiane de Morais Smith (Utrecht University)
The manipulation of the electron charge is at the heart of electronics. However, during the last decades another internal degree of freedom of the electron was explored, namely its spin, which led to the opening of a new research field, called spintronics. More recently, we started to investigate also the use of the electronic orbits to develop the field of orbitronics. In this talk, I will show how to construct new physical systems under demand, in the nanodomain. This research area is called quantum simulators, and is based on Feynman’s original idea of using one quantum system that can be manipulated at will to simulate the behavior of another more complex one. This field has flourished during the last decades in the areas of cold atoms and in nanophotonics. Here, I will present the recent progress in condensed matter. I will start discussing a few recent experiments, in which 2D electron lattices were engineered on the nanoscale. The first is a decorated square lattice [1,2], in which we will manipulate the orbital degrees of freedom and the second is a Sierpinski gasket [3,4], which has dimension D = 1.58. The realization of fractal lattices opens up the path to electronics and spintronics in fractional dimensions.
 M.R. Slot, T.S. Gardenier, P.H. Jacobse, G.C.P. van Miert, S.N. Kempkes, S.J.M. Zevenhuizen, C. Morais Smith, D. Vanmaekelbergh, and I. Swart, “Experimental realisation and characterisation of an electronic Lieb lattice”, Nature Physics 13, 672 (2017).  M. R. Slot et al., “p-band engineering in artificial electronic lattices”, Phys. Rev. X 9, 011009 (2019).  S.N. Kempkes, M.R. Slot, S.E. Freeney, S.J.M. Zevenhuizen, D. Vanmaekelbergh, I. Swart, and C. Morais Smith, “Design and characterization of electronic fractals”, Nature Physics 15, 127(2019)  Youtube: Seeker https://youtu.be/OsZHRCuTIS8
Tuning Dimensionality with Pressure in Layered Magnetic Materials
David Jarvis (Cambridge University)
Low-dimensional magnetic materials provide rich opportunities to study new physics and observe how established behaviour changes as systems are tuned from two to three dimensions. Pressure is the ideal tuning parameter in these materials, allowing us to directly influence the crystal lattice whilst measuring electrical, magnetic and structural properties. The family of materials MPS3 (M = Fe, Ni, Mn) undergo dramatic structural transitions under pressure and change from being strongly electrically insulating to metallic. Our results from record pressures shed light on the changing physics in these compounds, which may see use in future electronics.
High intensity MRI's and the future of MRI
Tom O'Reilly (Leiden UMC)
Since the discovery of nuclear magnetic resonance in the first half of the 20th century, significant advances in physics, material science, mathematics and engineering have developed the field to a point where nearly every hospital in Holland now has one or more MRI scanners. In this talk we’ll look at the physics behind the static, quasi-static and high-frequency magnetic fields involved in generating MRI images, and look at where the field of MRI is moving in the future.
Magnetic recording of information: from fundamentals to brain-inspired computing concepts
Prof. dr. Theo Rasing (Radboud University)
The ability to switch magnets between two stable bit states is the main principle of digital data storage technologies since the early days of the computer. Due to many new ideas, originating from fundamental research during the last 50 years, this technology has developed in a breathtaking fashion. However, the explosive growth of digital data and its related energy consumption is pushing the need to develop fundamentally new physical principles and materials for faster, smaller and more energy-efficient processing and storage of data. Since our demonstration of magnetization reversal by a single 40 femtosecond laser pulse, the manipulation of spins by ultra-short laser pulses has developed into an alternative and energy efficient approach to magnetic recording. Ultimately, future brain-inspired technology should provide room temperature operation down to picosecond timescales, nanoscale dimensions and at an energy dissipation as low as the Landauer limit (~zJ). In this talk, I will discuss some first results and the potential of optical control of magnetism to implement brain-inspired computing concepts in magnetic materials that operate close to these ultimate limits.