by Louk Rademaker | May 15, 2025 | Next Meeting
When the period of an incommensurate charge density wave (ICDW) approaches a multiple of a lattice vector, the energy gain from locking the period can drive a transition into an intermediate near-commensurate (NC) state made of locally commensurate regions separated...
by Louk Rademaker | Apr 25, 2025 | Next Meeting
In quantum materials, electronic responses to electric and magnetic fields can manifest the quantum geometry of electronic wavefunctions. These geometrical properties are encoded in the Berry curvature, quantum metric, and quantum geometric connection. The Berry...
by Louk Rademaker | Apr 1, 2025 | Past meetings
In this talk, I will briefly review the physics of two-dimensional vortex lattices in thin superconducting films. By exploring the interplay between magnetic field, thermal fluctuations and disorder, I will provide a short overview of the different glassy phases which...
by Louk Rademaker | Mar 19, 2025 | Past meetings
Fractional Chern insulators (FCIs) are the lattice equivalent of the fractional quantum Hall effect, whereby the intrinsic properties of the lattice provide the necessary ingredients for the emergence of this strongly correlated phase. Their existence was first...
by Louk Rademaker | Jan 24, 2025 | Past meetings
We are a few years into the “nickel age of superconductivity” now. In this presentation I will review what we know so far and what open questions remain to be answered. I will cover both square-planar nickelates and octahedral nickelates and compare to what we have...
by Louk Rademaker | Jan 24, 2025 | Past meetings
Strain engineering is an effective approach to tune the electronic properties of materials by applying mechanical deformation to their lattice. Conventional straining methods for 3D materials, such as epitaxial growth on substrates with lattice mismatch, dielectric...
by Louk Rademaker | Oct 28, 2024 | Past meetings
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...
