by Louk Rademaker | Oct 28, 2024 | Next Meeting
Over the last 20 years, a lot of progress has been made in the realisation of 2D arrangements of magnetic islands. The moment of each island must point along a local axis, and the system can be described by interacting Ising spins. If the magnetic moments are parallel...
by Louk Rademaker | Oct 28, 2024 | Past meetings
Antiferromagnetic conductors with suitably broken spatial symmetries host spin-polarized bands, which lead to transport phenomena commonly observed in metallic ferromagnets. In bulk materials, it is the given crystalline structure that determines whether symmetries...
by Louk Rademaker | Oct 28, 2024 | Past meetings
Changing the properties of materials on demand is crucial both for understanding the conditions which allow for the appearance of emergent order and for generating new functionalities. Using laser light for this purpose is a particularly interesting approach: It...
by Louk Rademaker | Sep 10, 2024 | Past meetings
On conventional computers, the performance of AI models is limited by the data transfer between the memory and the processor. Compute-in-Memory architectures offer a new paradigm: Vector-Matrix Multiplications may be performed by a voltage drop through a matrix of...
by Louk Rademaker | Sep 10, 2024 | Past meetings
The translational symmetry of the ionic potential in a crystal results in a periodic electronic structure in momentum space. Analogously, the periodic electric field of an intense light pulse can create replica of electronic states. These so-called Floquet state are...
by Louk Rademaker | Mar 8, 2024 | Past meetings
I will illustrate the paradigm of computational materials discovery, as applied to the case of two-dimensional and one-dimensional materials.First, a high-throughput study of experimentally-known inorganic compounds identifies promising candidates that could be...
by Louk Rademaker | Mar 8, 2024 | Past meetings
The bandstructure of naturally occurring Bernal bilayer graphene exhibits four linearly dispersed Dirac cones [1] but changes drastically when large electric displacement fields are applied across the two layers. Here, tunable van Hove singularities lead to the...
by Louk Rademaker | Mar 8, 2024 | Past meetings
Complex polarisation textures and emergent functionalities under geometric confinement Ferroelectric materials can host a wide range of unusual structural features, often linked to novel functional properties, potentially useful for nanoelectronics applications. At...
by Louk Rademaker | Feb 28, 2024 | Past meetings
You can download the slides here (PDF). Please register at the doodle before Thursday evening if you want to join for pizza! Location: Stuckelberg, Ecole de PhysiqueTime: Friday 19 April 2024, 12:10 for pizza, 12:30 start discussion
by Louk Rademaker | Feb 20, 2024 | Past meetings
In the context of “flat superconductors”, the Berezinskii-Kosterlitz-Thouless (BKT) theory is naturally involved in the discussion, even if only indirectly. BKT physics is in fact necessary to allow for the (quasi-)long-range-order, otherwise prohibited by...
