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Excitonic condensation in systems of strongly correlated electrons
The idea of exciton condensation in solids was introduced in the 1960s with the analogy of
superconductivity in mind. While exciton supercurrents have been realised only in artificial …
superconductivity in mind. While exciton supercurrents have been realised only in artificial …
Giant exciton Fano resonance in quasi-one-dimensional
We report the complex dielectric function of the quasi-one-dimensional chalcogenide Ta 2
NiSe 5, which undergoes a structural phase transition presumably associated with exciton …
NiSe 5, which undergoes a structural phase transition presumably associated with exciton …
A New Era of Excitonic Insulators
The fundamental idea of the excitonic insulator (EI) driven by electron–hole correlations in
narrow-gap semiconductors or semimetals was originally proposed in the 1960s, and only …
narrow-gap semiconductors or semimetals was originally proposed in the 1960s, and only …
Phase diagram and collective excitations in an excitonic insulator from an orbital physics viewpoint
An excitonic-insulating system is studied from a viewpoint of the orbital physics in strongly
correlated electron systems. An effective model Hamiltonian for low-energy electronic states …
correlated electron systems. An effective model Hamiltonian for low-energy electronic states …
Photoinduced gap closure in an excitonic insulator
We study the dynamical phase transition out of an excitonic insulator phase after
photoexcitation using a time-dependent extension of the self-consistent GW method. We …
photoexcitation using a time-dependent extension of the self-consistent GW method. We …
Exciton-phonon cooperative mechanism of the triple- charge-density-wave and antiferroelectric electron polarization in
We investigate the microscopic mechanisms of the charge-density-wave (CDW) formation in
a monolayer TiSe 2 using a realistic multiorbital dp model with electron-phonon coupling …
a monolayer TiSe 2 using a realistic multiorbital dp model with electron-phonon coupling …
Spin state ordering of strongly correlating induced at ultrahigh magnetic fields
Magnetization measurements of LaCoO 3 have been carried out up to 133 T, generated with
a destructive pulse magnet at a wide temperature range from 2 to 120 K. A novel magnetic …
a destructive pulse magnet at a wide temperature range from 2 to 120 K. A novel magnetic …
Collective modes in excitonic magnets: Dynamical mean-field study
We present a dynamical mean-field study of dynamical susceptibilities in the two-band
Hubbard model. Varying the model parameters we analyze the two-particle excitations in the …
Hubbard model. Varying the model parameters we analyze the two-particle excitations in the …
Competition between excitonic charge and spin density waves: Influence of electron-phonon and Hund's rule couplings
We analyze the stability of excitonic ground states in the two-band Hubbard model with
additional electron-phonon and Hund's rule couplings using a combination of mean-field …
additional electron-phonon and Hund's rule couplings using a combination of mean-field …
Mott-enhanced exciton condensation in a Hubbard bilayer
We study the conditions to realize an excitonic condensed phase in an electron-hole bilayer
system with local Hubbard-like interactions at half-filling, where we can address the interplay …
system with local Hubbard-like interactions at half-filling, where we can address the interplay …