5 papers
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-Tunable Giant Second-Harmonic Generation in BiOX (X=S, Se, Te)
Zhefeng Lou, Zhihao Gong, Ziye Zhu +3
Two-dimensional (2D) materials with giant nonlinear optical (NLO) responses are essential for the development of advanced on-chip NLO devices. Using first-principles calculations,…
Phase engineering of giant second harmonic generation in BiOSe
Zhefeng Lou, Yingjie Zhao, Zhihao Gong +16
Two-dimensional (2D) materials with remarkable second-harmonic generation (SHG) hold promise for future on-chip nonlinear optics. Relevant materials with both giant SHG response an…
One-dimensional Multiferroic Semiconductor WOI3: Unconventional Anisotropic d^1 Rule and Bulk Photovoltaic Effect
Zhihao Gong, Yechen Xun, Zhuang Qian +3
The pursuit of multiferroic magnetoelectrics, combining simultaneous ferroelectric and magnetic orders, remains a central focus in condensed matter physics. Here we report the cent…
Switchable band topology and geometric current in sliding bilayer elemental ferroelectric
Zhuang Qian, Zhihao Gong, Jian Li +2
We demonstrate that sliding motion between two layers of the newly discovered ferroelectric and topologically trivial bismuth (Bi) monolayer [Nature 617, 67 (2023)] can induce a se…