157 citations · 1.9k across the 60 of their papers we have counts for
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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…
High-harmonic generation in one-dimensional Mott insulator
Yuta Murakami, Shintaro Takayoshi, Akihisa Koga +1
We study high-harmonic generation (HHG) in the one-dimensional Hubbard model in order to understand its relation to elementary excitations as well as the similarities and differenc…
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…
Nonthermal excitonic condensation near a spin-state transition
Philipp Werner, Yuta Murakami
We consider a two-orbital Hubbard model with Hund coupling and crystal-field splitting and show that in the vicinity of the high-spin/low-spin transition, crystal-field quenches ca…
High-harmonic generation in spin-orbit coupled systems
Markus Lysne, Yuta Murakami, Michael Schüler +1
We study high-harmonic generation in two-dimensional electron systems with Rashba and Dresselhaus spin-orbit coupling and derive harmonic generation selection rules with the help o…
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…
Excitonic condensation reflecting electronic states in two-band Penrose-Hubbard model
Ken Inayoshi, Yuta Murakami, Akihisa Koga
We study the excitonic insulating (EI) phase in the two-band Hubbard models on the Penrose tiling. Performing the real-space mean-field calculations systematically, we obtain the g…
Signatures of bosonic excitations in high-harmonic spectra of Mott insulators
Markus Lysne, Yuta Murakami, Philipp Werner
The high harmonic spectrum of the Mott insulating Hubbard model has recently been shown to exhibit plateau structures with cutoff energies determined by th nearest neighbor doub…
Spin transport in the Quantum Spin Liquid State in the Kitaev model: role of the fractionalized quasiparticles
Akihisa Koga, Tetsuya Minakawa, Yuta Murakami +1
We investigate the real-time spin response of the Kitaev model upon stimuli of a pulsed magnetic field in one of the edges using the exact diagonalization method. It is found…