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Frontiers in Physics, 2022 We study the magnetic and spectral properties of a single-band Hubbard model for the infinite-layer nickelate compound LaNiO2. As spatial correlations turn out to be the key ingredient for understanding its physics, we use two complementary extensions of
Marcel Klett +2 more
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Tunneling Current Through a Double Quantum Dots System
IEEE Access, 2022 Electrostatically confined quantum dots in semiconductors hold the promise to achieve high scalability and reliability levels for practical implementation of solid-state qubits where the electrochemical potentials of each quantum dot can be independently
Amin Rassekh +3 more
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Superfluid density and two-component conductivity in hole-doped cuprates
Frontiers in Physics, 2022 While the pseudogap dominates the phase diagram of hole-doped cuprates, connecting the antiferromagnetic parent insulator at low doping to the strange metal at higher doping, its origin and relation to superconductivity remains unknown.
Jake Ayres +4 more
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Microscopic theory of high-temperature superconductivity in strongly correlated electronic systems
Condensed Matter Physics, 2021 A consistent microscopic theory of superconductivity for strongly correlated electronic systems is presented. The Dyson equation for the normal and anomalous Green functions for the projected (Hubbard) electronic operators is derived.
N.M. Plakida
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Photoemission "experiments" on holographic lattices
SciPost Physics Core, 2023 We construct a 2D holographic ionic lattice with hyperscaling-violating infrared geometry and study single-electron spectral functions ("ARPES photoemission curves") on this background. The spectra typically show a three-peak structure, where the central
Filip Herček, Vladan Gecin, Mihailo Čubrović
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Level statistics of the one-dimensional ionic Hubbard model
Physical Review Research, 2022 In this paper we analyze the spectral level statistics of the one-dimensional ionic Hubbard model, the Hubbard model with an alternating on-site potential.
Jeannette De Marco +5 more
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Violation of the Luttinger sum rule within the Hubbard model on a triangular lattice [PDF]
, 2008 The frequency-moment expansion method is developed to analyze the validity of the Luttinger sum rule within the Mott-Hubbard insulator, as represented by the generalized Hubbard model at half filling and large $U$.
A. Rosch +11 more
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Effective hopping in holographic Bose and Fermi-Hubbard models
Journal of High Energy Physics, 2019 In this paper, we analyze a proposed gravity dual to a SU(N) Bose-Hubbard model, as well as construct a holographic dual of a SU(N) Fermi-Hubbard model from D-branes in string theory. In both cases, the SU(N) is dynamical, i.e.
Mitsutoshi Fujita +3 more
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The Fractal-Lattice Hubbard Model [PDF]
QuantumHere, we investigate the fractal-lattice Hubbard model using various numerical methods: exact diagonalization, the self-consistent diagonalization of a (mean-field) Hartree-Fock Hamiltonian and state-of-the-art Auxiliary-Field Quantum Monte Carlo.
Monica Conte +3 more
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Antiferromagnetism and single-particle properties in the two-dimensional half-filled Hubbard model: Slater vs Mott-Heisenberg [PDF]
, 2003 We study antiferromagnetism and single-particle properties in the two-dimensional half-filled Hubbard model at low temperature. Collective spin fluctuations are governed by a non-linear sigma model that we derive from the Hubbard model for any value of ...
Borejsza, K., Dupuis, N.
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