4 papers · 1 filter
Giant Nonlinear Photon-Drag Currents in Moiré Bilayers
Zhuocheng Lu, Zhuang Qian, Zhichao Guo +4
The bulk photovoltaic effect provides a fundamental pathway for direct light-to-current conversion in quantum materials. However, these nonlinear currents are often strictly constr…
Dissipation-Shaped Quantum Geometry in Nonlinear Transport
Zhichao Guo, Xing-Yuan Liu, Hua Wang +2
The theory of the intrinsic nonlinear Hall effect, a key probe of quantum geometry, is plagued by conflicting expressions for the conductivity that is independent of the dissipatio…
Projector Method for Nonlinear Light-Matter Interactions and Quantum Geometry
Zhichao Guo, Zhuocheng Lu, Hua Wang
We develop a systematic projector-based Feynman diagram framework that intrinsically encodes quantum geometry for nonlinear optical responses. By explicitly incorporating geometric…
Bicircular Light Induced Multi-State Geometric Current
Zhichao Guo, Zhuocheng Lu, Hua Wang +1
We investigate the photocurrent induced by bicircular light (BCL) in materials, with a focus on its multi-state geometric nature. BCL, a combination of left- and right-circularly p…