6 papers
Tunable Kondo effect in a bilayer graphene quantum channel
Josep Ingla-Aynés, Serhii Volosheniuk, Talieh S. Ghiasi +5
The interaction between itinerant electrons and localized spins is key to a wide range of electronic phenomena. Of particular interest is the regime where the interacting electrons…
Tunable spin-orbit splitting in bilayer graphene/WSe quantum devices
Jonas D. Gerber, Efe Ersoy, Michele Masseroni +14
Bilayer graphene (BLG)-based quantum devices represent a promising platform for emerging technologies, such as quantum computing and spintronics. However, their intrinsically weak…
Anomalous conductance steps in three-dimensional topological insulator HgTe-based quantum point contacts
Elisabeth Richter, Michael Barth, Dmitriy A. Kozlov +8
We explore electrical transport through a point contact in strained HgTe, a three-dimensional topological insulator. In the absence of a magnetic field , there is no quantizatio…
Adhesion and Reconstruction of Graphene/Hexagonal Boron Nitride Heterostructures: A Quantum Monte Carlo Study
Marcin Szyniszewski, Elaheh Mostaani, Angelika Knothe +4
We investigate interlayer adhesion and relaxation at interfaces between graphene and hexagonal boron nitride (hBN) monolayers in van der Waals heterostructures. The adhesion potent…
Extended Hubbard model describing small multi-dot arrays in bilayer graphene
Angelika Knothe, Guido Burkard
We set up and parametrize a Hubbard model for interacting quantum dots in bilayer graphene and study double dots as the smallest multi-dot system. We demonstrate the tunability of…
Tuning confined states and valley g-factors by quantum dot design in bilayer graphene
Dennis Mayer, Angelika Knothe
Electrostatically confined quantum dots in bilayer graphene have shown potential as building blocks for quantum technologies. To operate the dots, e.g., as qubits, a precise unders…