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Article
Open AccessFlavour-selective localization in interacting lattice fermions
A large repulsion between particles in a quantum system can lead to their localization, an effect responsible for the Mott insulator phases in strongly correlated materials. In a system with multiple orbitals,...
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Article
Mottness at finite do** and charge instabilities in cuprates
The influence of Mott physics on the do**–temperature phase diagram of copper oxides represents a major issue that is the subject of intense theoretical and experimental efforts. Here, we investigate the ult...
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Article
Snapshots of the retarded interaction of charge carriers with ultrafast fluctuations in cuprates
One of the pivotal questions in the physics of high-temperature superconductors is whether the low-energy dynamics of the charge carriers is mediated by bosons with a characteristic timescale. This issue has r...
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Article
Phonon softening and dispersion in the 1D Holstein model of spinless fermions
We investigate the effect of electron-phonon interaction on the phononic properties in the one-dimensional half-filled Holstein model of spinless fermions. By means of determinantal Quantum Monte Carlo simula...
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Article
Stabilization of A-type layered antiferromagnetic phase in LaMnO3 by cooperative Jahn-Teller deformations
It is shown that the layered antiferromagnetic order in stoechiometric LaMn03 cannot be understood purely from electronic interactions. On the contrary, it mainly results from strong cooperative Jahn-Teller defor...
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Article
Small polaron formation in many-particle states of the Hubbard-Holstein model: The one-dimensional case
We investigate polaron formation in a many-electron system in the presence of a local repulsion sufficiently strong to prevent local-bipolaron formation. Specifically, we consider a Hubbard-Holstein model of i...