117 citations · 146 across the 7 of their papers we have counts for
4 papers · 1 filter
Quantum Geometry and Topology of Bulk Plasmons in Weyl Metals
Hong-Yi Xie, Peter Abbamonte, Bruno Uchoa
We address the quantum geometric structure of plasmons in Fermi surfaces enclosing a topological charge. We demonstrate that Weyl fermion plasmons have monopole structure, are topo…
Optical selection rules of topological excitons in flat bands
Mara Lozano, Hong-Yi Xie, Bruno Uchoa
Topological excitons are superpositions of electron-hole pair states, characterized by an envelope function with finite vorticity in momentum space. This vorticity is determined by…
Thermal and thermoelectric transport in flat bands with non-trivial quantum geometry
Kevin Wen, Hong-Yi Xie, Assa Auerbach +1
Although quasiparticles in flat bands have zero group velocity, they can display an anomalous velocity due to the quantum geometry. We address the thermal and thermoelectric transp…
Theory of topological exciton insulators and condensates in flat Chern bands
Hong-Yi Xie, Pouyan Ghaemi, Matteo Mitrano +1
Excitons are the neutral quasiparticles that form when Coulomb interactions create bound states between electrons and holes. Due to their bosonic nature, excitons are expected to c…