14 citations · 18 across the 5 of their papers we have counts for
9 papers
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…
General Framework for Twisted Bilayer Photonic Crystal with Interlayer Coupling and Far-Field Response
Shupeng Xu, Dun Wang, Ritesh Agarwal
We develop a general theory for twisted bilayer photonic crystals that takes into account both far-field response and near-field coupling. The theory is based on the framework of a…
Strong Chirality Suppression in 1-D correlated Weyl Semimetal (TaSe4)2I
Utkarsh Khandelwal, Harshvardhan Jog, Shupeng Xu +6
The interaction of light with correlated Weyl semimetals (WSMs) provides a unique platform for exploring non-equilibrium phases and fundamental properties such as chirality. Here,…
Simple realization of a fragile topological lattice with quasi flat-bands in a microcavity array
Yuhui Wang, Shupeng Xu, Liang Feng +1
Topological flat bands (TFBs) are increasingly recognized as an important paradigm to study topological effects in the context of strong correlation physics. As a representative ex…
Opto-twistronic Hall effect in a three-dimensional spiral lattice
Zhurun Ji, Yuzhou Zhao, Yicong Chen +7
Studies of moire systems have elucidated the exquisite effect of quantum geometry on the electronic bands and their properties, leading to the discovery of new correlated phases. H…
Anion Exchange in II-VI Semiconducting Nanostructures via Atomic Templating
Rahul Agarwal, Nadia M. Krook, Ming-Liang Ren +4
Controlled chemical transformation of nanostructures is a promising technique to obtain precisely designed novel materials which are difficult to synthesize otherwise. We report hi…