154 citations · 1.2k across the 19 of their papers we have counts for
19 papers
Long distance electron-electron scattering detected with point contacts
Lev V. Ginzburg, Yuze Wu, Marc P. Röösli +15
We measure electron transport through point contacts in an electron gas in AlGaAs/GaAs heterostructures and graphene for a range of temperatures, magnetic fields and electron densi…
CropGym: a Reinforcement Learning Environment for Crop Management
Hiske Overweg, Herman N. C. Berghuijs, Ioannis N. Athanasiadis
Nitrogen fertilizers have a detrimental effect on the environment, which can be reduced by optimizing fertilizer management strategies. We implement an OpenAI Gym environment where…
Tunable Valley Splitting due to Topological Orbital Magnetic Moment in Bilayer Graphene Quantum Point Contacts
Yongjin Lee, Angelika Knothe, Hiske Overweg +10
In multivalley semiconductors, the valley degree of freedom can be potentially used to store, manipulate and read quantum information, but its control remains challenging. The vall…
The Electronic Thickness of Graphene
Peter Rickhaus, Ming-Hao Liu, Marcin Kurpas +10
The van-der-Waals stacking technique enables the fabrication of heterostructures, where two conducting layers are atomically close. In this case, the finite layer thickness matters…
Interpretable Outcome Prediction with Sparse Bayesian Neural Networks in Intensive Care
Hiske Overweg, Anna-Lena Popkes, Ari Ercole +4
Clinical decision making is challenging because of pathological complexity, as well as large amounts of heterogeneous data generated as part of routine clinical care. In recent yea…
Excited states in bilayer graphene quantum dots
A. Kurzmann, M. Eich, H. Overweg +11
We report on ground- and excited state transport through an electrostatically defined few-hole quantum dot in bilayer graphene in both parallel and perpendicular applied magnetic f…
Charge detection in gate-defined bilayer graphene quantum dots
A. Kurzmann, H. Overweg, M. Eich +8
We report on charge detection in electrostatically-defined quantum dot devices in bilayer graphene using an integrated charge detector. The device is fabricated without any etching…
Topologically non-trivial valley states in bilayer graphene quantum point contacts
Hiske Overweg, Angelika Knothe, Thomas Fabian +11
We present measurements of quantized conductance in electrostatically induced quantum point contacts in bilayer graphene. The application of a perpendicular magnetic field leads to…
Interactions and magnetotransport through spin-valley coupled Landau levels in monolayer MoS
Riccardo Pisoni, Andor Kormányos, Matthew Brooks +12
The strong spin-orbit coupling and the broken inversion symmetry in monolayer transition metal dichalcogenides (TMDs) results in spin-valley coupled band structures. Such a band st…
Magnetotransport and lateral confinement in an InSe van der Waals Heterostructure
Yongjin Lee, Riccardo Pisoni, Hiske Overweg +10
In the last six years, Indium selenide (InSe) has appeared as a new van der Waals heterostructure platform which has been extensively studied due to its unique electronic and optic…
Coupled quantum dots in bilayer graphene
Marius Eich, Riccardo Pisoni, Alessia Pally +8
Electrostatic confinement of charge carriers in bilayer graphene provides a unique platform for carbon-based spin, charge or exchange qubits. By exploiting the possibility to induc…
Spin and Valley States in Gate-defined Bilayer Graphene Quantum Dots
Marius Eich, František Herman, Riccardo Pisoni +9
In bilayer graphene, electrostatic confinement can be realized by a suitable design of top and back gate electrodes. We measure electronic transport through a bilayer graphene quan…
Transport through a network of topological states in twisted bilayer graphene
Peter Rickhaus, John Wallbank, Sergey Slizovskiy +10
We explore a network of electronic quantum valley Hall (QVH) states in the moiré crystal of minimally twisted bilayer graphene. In our transport measurements we observe Fabry-Pérot…
Gate-Tunable Quantum Dot in a High Quality Single Layer MoS Van der Waals Heterostructure
Riccardo Pisoni, Zijin Lei, Patrick Back +7
We have fabricated an encapsulated monolayer MoS device with metallic ohmic contacts through a pre-patterned hBN layer. In the bulk, we observe an electron mobility…
Edge channel confinement in a bilayer graphene -- quantum dot
Hiske Overweg, Peter Rickhaus, Marius Eich +6
We combine electrostatic and magnetic confinement to define a quantum dot in bilayer graphene. The employed geometry couples -doped reservoirs to a -doped dot. At magnetic fi…
Electrostatically induced quantum point contact in bilayer graphene
Hiske Overweg, Hannah Eggimann, Xi Chen +10
We report the fabrication of electrostatically defined nanostructures in encapsulated bilayer graphene, with leakage resistances below depletion gates as high as G.…
Gate-Defined One-Dimensional Channel and Broken Symmetry States in MoS van der Waals Heterostructures
Riccardo Pisoni, Yongjin Lee, Hiske Overweg +7
We have realized encapsulated trilayer MoS devices with gated graphene contacts. In the bulk, we observe an electron mobility as high as 7000~cm/(V s) at a density of 3 $…
Oscillating magnetoresistance in graphene p-n junctions at intermediate magnetic fields
Hiske Overweg, Hannah Eggimann, Ming-Hao Liu +10
We report on the observation of magnetoresistance oscillations in graphene p-n junctions. The oscillations have been observed for six samples, consisting of single-layer and bilaye…
Probing the magnetic moment of FePt micromagnets prepared by Focused Ion Beam milling
H. C. Overweg, A. M. J. den Haan, H. J. Eerkens +5
We investigate the degradation of the magnetic moment of a 300 nm thick FePt film induced by Focused Ion Beam (FIB) milling. A rod is milled ou…