by Louk Rademaker | Oct 17, 2022 | Past meetings
A recent ARPES study on surface doped black phosphorus reported funny non-monotonous k(E) dispersions near the chemical potential [1]. I will discuss this paper and show that dispersive “band-like” features in ARPES do not always imply Bloch states. If time permits, I...
by Louk Rademaker | Oct 17, 2022 | Past meetings
Electrolytes can be used to very effectively transfer the electrostatic potential from a metal electrode (gate) to the surface of a semiconductor, to realize ionically gated devices. Even though the technique is by now long established, its application to 2D materials...
by Louk Rademaker | May 3, 2022 | Past meetings
The so-called strange metals are characterized by various anomalous properties, the most famous of which being a resistivity that remains linear down to the lowest temperatures. Such behavior is observed in several systems, starting historically from the cuprates and...
by Louk Rademaker | Apr 1, 2022 | Past meetings
Ferroelectrics are materials exhibiting a remanent polarisation that can be switched by applying an electric field. These materials can consist of regions where the polarisation points in different directions, and each region with a uniform polarisation is called a...
by Louk Rademaker | Apr 1, 2022 | Past meetings
In 2020 a publication in Nature announced the discovery of room-temperature superconductivity in a carbonaceous sulfur hydride. On 15 February 2022 the following statement was issued “The editors of Nature have been alerted to concerns regarding the manner in which...
by Louk Rademaker | Apr 1, 2022 | Past meetings
The electronic band structure of atomically thin semiconductors can be tuned by applying a perpendicular electric field. The principle was demonstrated experimentally shortly after discovering graphene by opening a finite band gap (~100 meV) in graphene bilayers...
by Louk Rademaker | Mar 12, 2022 | Past meetings
I will present recent results on the exciton-polaron spectroscopy for the investigation of strongly correlated electronic states in homobilayers heterostructures. I will also discuss insights from the theory on the origin of incompressible electronic states in these...
by Louk Rademaker | Mar 7, 2022 | Past meetings
Recent experimental observations have shown that twisted transition metal dichalcogenides (TMDs) may host correlated phases which develop in presence of a Moiré superlattice [1,2]. Coupling to this long-wavelength periodic potential results in the formation of weakly...
by Louk Rademaker | Oct 3, 2021 | Past meetings
One of the most fascinating phenomena in two-dimensional quantum systems is the formation of topological order and the implied emergence of anyonic quasiparticles. Anyons have neither bosonic nor fermionic character, but their wave function can acquire an arbitrary...
by Louk Rademaker | Sep 27, 2021 | Past meetings
Since the discovery of high-temperature superconductivity in cuprates, Josephson junction based phase-sensitive experiments are believed and used to provide the most convincing evidence for determining the pairing symmetry. Regardless of different junction materials...
