7 papers
Euler Topology in Superconducting Honeycomb Lattices
Rasoul Ghadimi, Chiranjit Mondal, Bohm-Jung Yang
Electronic bands in systems with space-time inversion (IST) symmetry can host nontrivial Euler topology. Here, we investigate the band topology of IST-symmetric superconducting hon…
Wavefront-Dislocation Evolution via Quadratic Band Touching Annihilation
Rasoul Ghadimi, Jaehyeon Ahn, Sangmo Cheon
Wavefront dislocations (WDs) -- phase singularities observed in quasiparticle interference (QPI) experiments -- have been widely interpreted as the definitive real-space signatures…
Optical Signatures and Quantum Geometry in Proximity-Induced Topological Superconductors
Myungjun Kang, Yogeshwar Prasad, Nikhil Danny Babu +3
Topological-insulator-superconductor (TI-SC) heterostructures provide a promising platform for proximity-induced topological superconductivity, but diagnosing superconductivity at…
Evidence for electron localisation in a moiré-of-moiré superlattice
Hangyeol Park, Junhyeok Oh, Rasoul Ghadimi +7
The localisation of electrons in a lattice potential is an quantum-mechanical phenomenon and is often associated with remarkable physical properties of solids involving electron sp…
Quasiperiodic pairing in graphene quasicrystals
Rasoul Ghadimi, Bohm-Jung Yang
We investigate the superconducting instabilities of twisted bilayer graphene quasicrystals (TBGQC) obtained by stacking two monolayer graphene sheets with a relative twi…
Quantum Valley Hall effect without Berry curvature
Rasoul Ghadimi, Chiranjit Mondal, Sunje Kim +1
The quantum valley Hall effect (QVHE) is characterized by the valley Chern number (VCN) in a way that one-dimensional (1D) chiral metallic states are guaranteed to appear at the do…