187 citations · 2k across the 55 of their papers we have counts for
8 papers · 1 filter
Bulk Photovoltaic Effect Driven by Collective Excitations in a Correlated Insulator
Tatsuya Kaneko, Zhiyuan Sun, Yuta Murakami +2
We investigate the bulk photovoltaic effect, which rectifies light into electric current, in a collective quantum state with correlation driven electronic ferroelectricity. We show…
Low rank compression in the numerical solution of the nonequilibrium Dyson equation
Jason Kaye, Denis Golež
We propose a method to improve the computational and memory efficiency of numerical solvers for the nonequilibrium Dyson equation in the Keldysh formalism. It is based on the empir…
Nonlinear spectroscopy of collective modes in excitonic insulator
Denis Golez, Zhiyuan Sun, Yuta Murakami +2
The nonlinear optical response of an excitonic insulator coupled to lattice degrees of freedom is shown to depend in strong and characteristic ways on whether the insulating behavi…
Effects of frustration on the nonequilibrium dynamics of photo-excited lattice systems
Nikolaj Bittner, Denis Golež, Martin Eckstein +1
We theoretically investigate the effects of the lattice geometry on the nonequilibrium dynamics of photo-excited carriers in a half-filled two-dimensional Hubbard model. Using a no…
Collective Modes in Excitonic Insulators: Effects of Electron-Phonon Coupling and Signatures in Optical Response
Yuta Murakami, Denis Golež, Tatsuya Kaneko +3
We consider a two-band spinless model describing an excitonic insulator (EI) on the two-dimensional square lattice with anisotropic hopping parameters and electron-phonon (el-ph) c…
Imaging the coherent propagation of collective modes in the excitonic insulator candidate TaNiSe at room temperature
Hope M. Bretscher, Paolo Andrich, Yuta Murakami +10
Excitonic insulators host a condensate of electron-hole pairs at equilibrium, giving rise to collective many-body effects. Although several materials have emerged as excitonic insu…