A5033139202- Graphene research and applications
- 2D Materials and Applications
- Quantum and electron transport phenomena
- Nanowire Synthesis and Applications
- MXene and MAX Phase Materials
- Iron-based superconductors research
- Molecular Junctions and Nanostructures
- Plasmonic and Surface Plasmon Research
- Advanced Memory and Neural Computing
- Semiconductor Quantum Structures and Devices
- Heusler alloys: electronic and magnetic properties
- Semiconductor materials and devices
- Photonic Crystals and Applications
- GaN-based semiconductor devices and materials
- Material Science and Thermodynamics
- Mechanical and Optical Resonators
- Material Properties and Applications
- Physics of Superconductivity and Magnetism
- Thermal properties of materials
- Magnetic properties of thin films
- Carbon Nanotubes in Composites
- Advancements in Battery Materials
- Boron and Carbon Nanomaterials Research
- Advanced Thermoelectric Materials and Devices
- Thermodynamic and Structural Properties of Metals and Alloys
Aarhus University
2023-2025
Indian Institute of Science Bangalore
2015-2021
Superlattices from twisted graphene mono- and bilayer systems give rise to on-demand many-body states such as Mott insulators unconventional superconductors. These phenomena are ascribed a combination of flat bands strong Coulomb interactions. However, comprehensive understanding is lacking because the low-energy band structure strongly changes when an electric field applied vary electron filling. Here, we gain direct access filling-dependent (TBG) double (TDBG) by applying microfocused...
Grain boundaries (GBs) are undesired in large area layered 2D materials as they degrade the device quality and their electronic performance. Here we show that grain graphene which induce additional scattering of carriers conduction channel also act an strong source electrical noise especially at room temperature. From field effect transistors consisting single GB, find across GBs can be nearly 10 000 times larger than from equivalent dimensions crystalline graphene. At high carrier densities...
Despite its importance in the large-scale synthesis of transition metal dichalcogenides (TMDC) molecular layers, generic quantum effects on electrical transport across individual grain boundaries (GBs) TMDC monolayers remain unclear. Here we demonstrate that strong carrier localization due to increased density defects determines both temperature dependence and low-frequency noise at GBs chemical vapor deposition (CVD)-grown MoS2 layers. Using field effect devices designed explore GBs, show...
Abstract Van der Waals hybrids of graphene and transition metal dichalcogenides exhibit an extremely large response to optical excitation, yet counting photons with single‐photon resolution is not achieved. Here, a dual‐gated bilayer (BLG) molybdenum disulphide (MoS 2 ) hybrid are demonstrated, where opening band gap in the BLG allows low channel (receiver) noise gain (≈10 10 simultaneously. The resulting device capable unambiguous determination Poissonian emission statistics source at...
Ultrathin CrSBr flakes are exfoliated in situ on Au(111) and Ag(111) their electronic structure is studied by angle-resolved photoemission spectroscopy. The thin flakes' properties drastically different from those of the bulk material also substrate dependent. For both substrates, a strong charge transfer to observed, partly populating conduction band giving rise highly anisotropic Fermi contour with an Ohmic contact substrate. fundamental gap strongly renormalized compared bulk. flake...
Resolving low-energy features in the density of states (DOS) holds key to understanding a wide variety rich novel phenomena graphene-based 2D heterostructures. The Lifshitz transition bilayer graphene (BLG) arising from trigonal warping has been established theoretically and experimentally. Nevertheless, experimental realization its effects on transport properties challenging because relatively low energy scale (∼1 meV). In this work, we demonstrate that thermoelectric power (TEP) can be...
Controlling the electronic structure of two-dimensional materials using combination twist angle and electrostatic doping is an effective means to induce emergent phenomena. In bilayer graphene with interlayer near magic angle, dispersion strongly modified by a manifold hybridizing moir\'e Dirac cones leading flat band segments strong correlations. Numerous technical challenges arising from spatial inhomogeneity interactions, device functionality have so far limited momentum-resolved...
Graphene grain boundaries (GBs) have attracted interest for their ability to host nearly dispersionless electronic bands and magnetic instabilities. Here, we employ quantum transport universal conductance fluctuation measurements experimentally demonstrate a spontaneous breaking of time-reversal symmetry across individual GBs chemical vapor deposited graphene. While the indicate spin-scattering-induced dephasing hence formation local moments, below T≲4 K observe complete lifting at high...
Graphene constitutes one of the key elements in many functional van der Waals heterostructures. However, it has negligible optical visibility due to its monolayer nature. Here we study graphene various heterostructures and include effects source spectrum, oblique incidence spectral sensitivity detector obtain a realistic model. A experiment is performed at different wavelengths, resulting very good agreement with our calculations. This allows us reliably predict conditions for better The...
Superlattices from twisted graphene mono- and bi-layer systems give rise to on-demand quantum many-body states such as Mott insulators, unconventional superconductors the fractional Hall effect. These phenomena are observed in transport experiments when changing filling of low-energy electronic bands. Their origin is broadly ascribed a combination flat bands strong Coulomb interactions, yet comprehensive understanding lacking. This primarily because relevant band structure believed strongly...
Ultrathin CrSBr flakes are exfoliated \emph{in situ} on Au(111) and Ag(111) their electronic structure is studied by angle-resolved photoemission spectroscopy. The thin flakes' properties drastically different from those of the bulk material also substrate-dependent. For both substrates, a strong charge transfer to observed, partly populating conduction band giving rise highly anisotropic Fermi contour with an Ohmic contact substrate. fundamental gap strongly renormalized compared bulk....