127 citations · 806 across the 25 of their papers we have counts for
26 papers
Electron binding by charge disorder surrounding gapped bilayer graphene
Jude McClay, Angelika Knothe, Igor Rozhansky +1
Bilayer graphene (BLG) is a unique electronic material offering electrostatic tunability of its band gap. Here, we study how charge disorder in the dielectric environment modifies…
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…
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…
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…
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…
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…
Impact of competing energy scales on the shell-filling sequence in elliptic bilayer graphene quantum dots
Samuel Möller, Luca Banszerus, Angelika Knothe +7
We report on a detailed investigation of the shell-filling sequence in electrostatically defined elliptic bilayer graphene quantum dots (QDs) in the regime of low charge carrier oc…
Semimetallic and semiconducting graphene-hBN multilayers with parallel or reverse stacking
Xi Chen, Klaus Zollner, Christian Moulsdale +2
We theoretically investigate 3D layered crystals of alternating graphene and hBN layers with different symmetries. Depending on the hopping parameters between the graphene layers,…
Kagomé network of chiral miniband-edge states in double-aligned graphene-hexagonal boron nitride structures
Christian Moulsdale, Angelika Knothe, Vladimir Fal'ko
Twistronic heterostructures have recently emerged as a new class of quantum electronic materials with properties determined by the twist angle between the adjacent two-dimensional…
Probing two-electron multiplets in bilayer graphene quantum dots
Samuel Möller, Luca Banszerus, Angelika Knothe +10
We report on finite bias spectroscopy measurements of the two-electron spectrum in a gate defined bilayer graphene (BLG) quantum dot for varying magnetic fields. The spin and valle…
Theory of tunneling spectra for a few-electron bilayer graphene quantum dot
Angelika Knothe, Leonid I. Glazman, Vladimir I. Fal'ko
The tuneability and control of quantum nanostructures in two-dimensional materials offer promising perspectives for their use in future electronics. It is hence necessary to analyz…
Kondo effect and spin-orbit coupling in graphene quantum dots
Annika Kurzmann, Yaakov Kleeorin, Chuyao Tong +12
The Kondo effect is a cornerstone in the study of strongly correlated fermions. The coherent exchange coupling of conduction electrons to local magnetic moments gives rise to a Kon…
Shell Filling and Trigonal Warping in Graphene Quantum Dots
Rebekka Garreis, Angelika Knothe, Chuyao Tong +8
Transport measurements through a few-electron circular quantum dot in bilayer graphene display bunching of the conductance resonances in groups of four, eight and twelve. This is i…
Tunable valley splitting and bipolar operation in graphene quantum dots
Chuyao Tong, Rebekka Garreis, Angelika Knothe +8
Quantum states in graphene are four-fold degenerate: two fold in spins, and two fold in valleys.Both degrees of freedom can be utilized for qubit preparations. In our bilayer graph…
Coherent Jetting behind a gate-defined Channel in Bilayer Graphene
Carolin Gold, Angelika Knothe, Annika Kurzmann +6
Graphene has evolved as a platform for quantum transport that can compete with the best and cleanest semiconductor systems. Recently, many interesting local properties of carrier t…
Quartet states in two-electron quantum dots in bilayer graphene
Angelika Knothe, Vladimir Fal'ko
Trapping electrons in quantum dots and controlling their collective quantum states is crucial for converting semiconductor structures into bits of quantum information processing. H…
Composite super-moiré lattices in double aligned graphene heterostructures
Zihao Wang, Yi Bo Wang, J. Yin +23
When two-dimensional atomic crystals are brought into close proximity to form a van der Waals heterostructure, neighbouring crystals can start influencing each others electronic pr…
Engineering of the topological magnetic moment of electrons in bilayer graphene using strain and electrical bias
Christian Moulsdale, Angelika Knothe, Vladimir Fal'ko
Topological properties of electronic states in multivalley two-dimensional materials, such as mono- and bilayer graphene, or thin films of rhombohedral graphite, give rise to vario…
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…
Minibands in twisted bilayer graphene probed by magnetic focusing
A. I. Berdyugin, B. Tsim, P. Kumaravadivel +9
Magnetic fields force ballistic electrons injected from a narrow contact to move along skipping orbits and form caustics. This leads to pronounced resistance peaks at nearby voltag…
Semimetallic features in quantum transport through a gate-defined point contact in bilayer graphene
Thomas L M Lane, Angelika Knothe, Vladimir I Fal'ko
We demonstrate that, at the onset of conduction, an electrostatically defined quantum wire in bilayer graphene (BLG) with an interlayer asymmetry gap may act as a 1D semimetal, due…
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…
Influence of minivalleys and Berry curvature on electrostatically induced quantum wires in gapped bilayer graphene
Angelika Knothe, Vladimir Fal'ko
We show that the spectrum of subbands in an electrostatically defined quantum wire in gapped bilayer graphene directly manifests the minivalley structure and reflects Berry curvatu…