20 citations · 41 across the 10 of their papers we have counts for
10 papers
Weak localization in magnetic Euler bands
Doh Young Kim, Seung Hun Lee, Akira Furusaki +1
We study the quantum correction to the conductivity due to disorder in two-dimensional fragile topological bands with nonzero Euler class. Contrary to graphene where two Dirac node…
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…
Embedding independent length scale of flat bands
Seokju Lee, Seung Hun Lee, Bohm-Jung Yang
In flat-band systems with quenched kinetic energy, most of the conventional length scales related to the band dispersion become ineffectual. Although a few geometric length scales,…
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…
Revisiting the magnetic responses of bilayer graphene from the perspective of the quantum distance
Chang-geun Oh, Jun-Won Rhim, Bohm-Jung Yang
We study the influence of the quantum geometry on the magnetic responses of quadratic band crossing semimetals. More explicitly, we examine the Landau levels, quantum Hall effect,…
Euler band topology in spin-orbit coupled magnetic systems
Seung Hun Lee, Yuting Qian, Bohm-Jung Yang
The Euler class characterizes the topology of two real bands isolated from other bands in two-dimensions. Despite various intriguing topological properties predicted up to now, the…
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…
Nodal fermions in a strongly spin-orbit coupled frustrated pyrochlore superconductor
Dongjin Oh, Junha Kang, Yuting Qian +11
The pyrochlore lattice, a three-dimensional network of corner-sharing tetrahedra, is a promising material playground for correlated topological phases arising from the interplay be…
Quantum geometric bound for saturated ferromagnetism
Junha Kang, Taekoo Oh, Junhyun Lee +1
Despite its abundance in nature, predicting the occurrence of ferromagnetism in the ground state is possible only under very limited conditions such as in a flat band system with r…