Phys.org March 2, 2023 Multilayered graphene has many promising qualities ranging from widely tunable band structure and special optical properties to new forms of superconductivity. An international team of researchers (Austria, Israel) studied multilayer graphene for the possibility of creating topological superconductivity. In their theoretical model, simulated on a computer, they looked at various possible arrangements of different graphene sheets on top of each other and the behavior of electrons that move in the multiplayer graphene. Depending on how the different layers of graphene are shifted with respect to each other and on how many layers there were, the positively […]
Tag Archives: Topological superconductivity
New material could be two superconductors in one
MIT News November 15, 2021 An international team of researchers (USA – MIT, Rutgers University, National High Magnetic Field Laboratory, Harvard University, Japan) synthesized layered superconductor Ba6Nb11S28. Instead of via one electron a superconductor carries charge by two electrons bound together in a Cooper pair. By applying an in-plane magnetic field, they observed an abrupt, partial suppression of diamagnetism below the upper critical magnetic field, which is suggestive of an emergent phase within the superconducting state. It turns out this kind of superconductor can be manipulated to form a variety of unusual patterns as Cooper pairs move between Landau levels. […]
Ultra-thin designer materials unlock quantum phenomena
Science Daily December 17, 2020 Exotic states such as topological insulators, superconductors and quantum spin liquids are often challenging or impossible to create in a single material. The problem can be circumvented by deliberately selecting the combination of materials in heterostructures so that the desired physics emerges from interactions between the different components. An international team of researchers (Finland, Poland, Japan) used molecular-beam epitaxy to grow 2D islands of ferromagnetic chromium tribromide on superconducting niobium diselenide. They used low-temperature scanning tunneling microscopy and spectroscopy to reveal the signatures of one-dimensional Majorana edge modes. The fabricated 2D van der Waals heterostructure […]