4 papers
Microscopic Theory of Light-Induced Coherent Phonons Mediated by Quantum Geometry
Jiaming Hu, Zhichao Guo, Wenbin Li +2
Light-induced coherent phonons provide a powerful platform for ultrafast control of material properties. However, the microscopic theory and quantum geometric nature of this phenom…
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…
Pure momentum-shift bulk photovoltaic effect in ferroelectric flat-band Mott insulators
Zhuocheng Lu, Zhihao Gong, Jingshan Qi +2
The shift current photovoltaic effect is conventionally understood as the real-space displacement of a wave packet induced by photoexcitation. However, this interpretation becomes…
Quantum Geometric Origin of Strain-Induced Ferroelectric Phase Transitions
Jiaming Hu, Ziye Zhu, Yubo Yuan +3
Strain-regulated ferroelectric (FE) materials have long attracted significant attention due to their diverse applications. While soft-phonon theory and the (pseudo) Jahn-Teller eff…