45 citations · 180 across the 17 of their papers we have counts for
17 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…
Non-Abelian charge conversion in bilayer binary honeycomb lattice systems
Chiranjit Mondal, Rasoul Ghadimi, Bohm-Jung Yang
In two-dimensional systems with space-time inversion symmetry, Dirac nodes (DNs) carry non-Abelian topological charges which induce intriguing momentum space braiding phenomenon. A…
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…
Quantum Valley and Sub-valley Hall Effect in the Large Angle Twisted Bilayer Graphene
Chiranjit Mondal, Rasoul Ghadimi, Bohm-Jung Yang
We study the quantum valley Hall effect and related domain wall modes in twisted bilayer graphene at a large commensurate angle. Due to the quantum valley and sub-valley Hall effec…
Confined states and topological phases in two-dimensional quasicrystalline -flux model
Rasoul Ghadimi, Masahiro Hori, Takanori Sugimoto +1
Motivated by topological equivalence between an extended Haldane model and a chiral--flux model on a square lattice, we apply -flux models to two-dimensional bipartite quasic…
Boundary obstructed topological superconductor in buckled honeycomb lattice under perpendicular electric field
Rasoul Ghadimi, Seung Hun Lee, Bohm-Jung Yang
In this work, we show that a buckled honeycomb lattice can host a boundary-obstructed topological superconductor (BOTS) in the presence of f-wave spin-triplet pairing (fSTP). The u…
Higher-dimensional Hofstadter butterfly on Penrose lattice
Rasoul Ghadimi, Takanori Sugimoto, Takami Tohyama
Quasicrystal is now open to search for novel topological phenomena enhanced by its peculiar structure characterized by an irrational number and high-dimensional primitive vectors.…
Topological superconductivity in quasicrystals
Rasoul Ghadimi, Takanori Sugimoto, K. Tanaka +1
We propose realization of non-Abelian topological superconductivity in two-dimensional quasicrystals by the same mechanism as in crystalline counterparts. Specifically, we study a…
Mean-field study of the Bose-Hubbard model in Penrose lattice
Rasoul Ghadimi, Takanori Sugimoto, Takami Tohyama
We examine the Bose-Hubbard model in the Penrose lattice based on inhomogeneous mean-field theory. Since averaged coordination number in the Penrose lattice is four, mean-field pha…
Disorder and Zeeman coupling induced gap-filling states in the nodeless chiral superconducting Bi/Ni bilayer system
Rasoul Ghadimi, Mehdi Kargarian, S. Akbar Jafari
Motivated by the recently discovered time-reversal symmetry-breaking superconductivity in epitaxial Bi/Ni bilayer system with transition temperature K and the obser…
Competing superconducting phases in interacting two-dimensional electron gas with strong Rashba spin-orbit coupling
Rasoul Ghadimi, Mehdi Kargarian, S. Akbar Jafari
In this work we study interacting electrons on square lattice in the presence of strong Rashba spin-orbit interaction. The spin-orbit term forces the time-reversal electron states…
Topological phase diagram of the disordered 2XY model in presence of generalized Dzyaloshinskii-Moriya Interaction
Alireza Habibi, Rasoul Ghadimi, S. A. Jafari +1
Topological index of a system specifies gross features of the system. However, in situations such as strong disorder where by level repulsion mechanism the spectral gap is closed,…
Majorana Zero-Energy Mode and Fractal Structure in Fibonacci-Kitaev Chain
Rasoul Ghadimi, Takanori Sugimoto, Takami Tohyama
We theoretically study a Kitaev chain with a quasiperiodic potential, where the quasiperiodicity is introduced by a Fibonacci sequence. Based on an analysis of the Majorana zero-en…