14 citations · 18 across the 5 of their papers we have counts for
4 papers · 1 filter
Unified First-Principles Theory of Finite-Wave-Vector Photocurrents in Crystals
Bumseop Kim, Sayed Ali Akbar Ghorashi, Yicong Chen +2
Spatially structured light carries independent phase and envelope variations in addition to its polarization and frequency. We develop a first-principles theory of second-order dc…
Spatially dispersive photogalvanic effects as a probe of quantum geometric tensor
Yicong Chen, Bumseop Kim, Senin Ahammed Akkara Paramban +8
Berry curvature and quantum metric of Bloch states govern a wide range of phenomena, yet unified experimental access to both remains limited. Here we show that light spatial-disper…
Quantum metric induced nonlinear transport in the hidden loop-current phase of kagome metal RbVSb
Jia-Chen Shi, Shupeng Xu, Utkarsh Khandelwal +4
A hidden low-temperature phase with possible loop-current order has been proposed in the kagome metals AVSb (A=K, Rb or Cs), but its experimental signatures remain subtle a…
Geometric Engineering of Flat Bands in a Single-layer Photonic Graphene
Dun Wang, Shupeng Xu, Jia-chen Shi +2
Photonic flat bands offer significant potential for strong light-matter interactions, nonlinear optics, and sensing thanks to their localization of light and high density of states…