5 papers
Optimized control protocols for stable skyrmion creation using deep reinforcement learning
Ji Seok Song, Se Kwon Kim, Kyoung-Min Kim
Generating stable magnetic skyrmions is essential for the practical application of skyrmion-based spintronic devices in thermally agitating environments. Here, we present a deep re…
Mobility-edge-embedded Hofstadter butterfly from a tilt-induced quasiperiodic potential
Sanghoon Lee, Kyoung-Min Kim
The Hofstadter butterfly (HB) and mobility edges (MEs) are hallmark phenomena of quasiperiodic systems, yet their interplay remains elusive. Here, we demonstrate their coexistence…
Topological Ising superconductivity in two-dimensional p-wave magnet
Kyoung-Min Kim, Gibaik Sim, Moon Jip Park
Fermi-surface spin splitting generated by non-relativistic exchange fields provides a new route to topological superconductivity without relying on strong spin-orbit coupling. Here…
Emergence of Unpinned Dirac Points in Defected Photonic Crystals
Chang-Hwan Yi, Kyoung-Min Kim
Unpinned Dirac points (DPs) are nodal point degeneracies that occur at generic momentum points lacking high symmetry, often exhibiting characteristics typically forbidden by symmet…
Emergence of Meron Kekulé lattices in twisted Néel antiferromagnets
Kyoung-Min Kim, Se Kwon Kim
A Kekulé lattice is an exotic, distorted lattice structure exhibiting alternating bond lengths, distinguished from naturally formed atomic crystals. Despite its evident applicabil…