Dresden 2026 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 58: Quantum Transport and Quantum Hall effects (joint session HL/TT)
TT 58.1: Talk
Wednesday, March 11, 2026, 15:00–15:15, POT/0006
High Harmonic Hall Currents Driven by Curved Conducting Nanoarchitecture — •Ching-Hao Chang1,2, Botsz Huang1,2, Wei-Xiang Yin1,2, and Xiao Zhang3 — 1Department of Physics, National Cheng Kung University Tainan, Taiwan — 2Center for Quantum Frontiers of Research and Technology (QFort), National Cheng Kung University Tainan 70101, Taiwan — 3Institute for Theoretical Solid State Physics Leibniz Institute for Solid State and Materials Research Dresden Helmholtzstr. 20, D-01069 Dresden, Germany
We theoretically establish a realizable non-perturbative mechanism for generating high harmon- ics (up to 6th order) in Hall currents within curved two-dimensional nanoarchitectures. Unlike previously explored perturbative mechanisms based on inversion symmetry breaking or Berry curvature, the high-harmonic generation demonstrated here is driven by magnetic-field dipoles induced purely by nanoscale curvature under an applied uniform magnetic field. We develop a theory showing that these harmonics originate from unique snake orbits induced by the interplay between an alternating electric field and curvature-induced magnetic-field dipole. Moreover, we establish quantitative control over harmonic suppression and enhancement by tuning the amplitude and orientation of the magnetic field, uncovering distinct symmetry-based even/odd harmonic selection rules. These findings provide a tunable platform for engineering nonlinear currents in curved electronics, with potential applications in developing high-frequency Hall sensors and THz devices.
Keywords: High harmonic generation; Hall effects; magnetic field dipole; curved nanomembranes; snake states