A5101833583- Graphene research and applications
- Topological Materials and Phenomena
- Nanowire Synthesis and Applications
- 2D Materials and Applications
- Physics of Superconductivity and Magnetism
- Advanced Memory and Neural Computing
- Quantum and electron transport phenomena
- Cold Atom Physics and Bose-Einstein Condensates
Beihang University
2024
Topological Dirac nodal-line semimetals host topologically nontrivial electronic structure with crossings around the Fermi level, which could affect photocarrier dynamics and lead to novel relaxation mechanisms. Herein, by using time- angle-resolved photoemission spectroscopy, we reveal previously-inaccessible linear dispersions of bulk conduction bands above level in a semimetal PtSn$_4$, as well momentum temporal evolution gapless nodal lines. A surprisingly ultrafast within few hundred...
To achieve logic operations via Majorana braiding, positional control of the bound states (MBSs) must be established. Here we report observation a striped surface charge order coexisting with superconductivity and its interaction MBS in topological superconductor 2M-WS2, using low-temperature scanning tunneling microscopy. By applying an out-of-plane magnetic field, observe that MBSs are absent vortices region stripe order. This is contrast to adjacent underlaying layers without order, where...
In twisted bilayer graphene (TBG) devices, local strains often coexist and entangle with the twist-angle dependent moir\'e superlattice, both of which can significantly affect electronic properties TBG. Here, using low-temperature scanning tunneling microscopy, we investigate fine evolution structures a TBG device continuous variation twist angles from 0.32{\deg} to 1.29{\deg}, spanning first (1.1{\deg}), second (0.5{\deg}) third (0.3{\deg}) magic angles. We reveal exotic behavior flat bands...
Majorana bound states (MBSs) are building blocks for topological quantum computing. They can be generated via the combination of electronic topology and superconductivity. To achieve logic operations braiding, positional control MBS must established. this end, exotic co-existing phases or collective modes in an intrinsic superconductor provide a tuning knob to manipulate MBS. Here we report observation striped surface charge order coexisting with superconductivity its controllable 2M-WS2...