Results 71 to 80 of about 6,166 (163)
Results in PhysicsTo address the issues of superconducting and charge properties in hydrated sodium cobalt, we investigate an extended ionic Hubbard model on the triangular lattice, which includes off-site attractions between sites with minor charges.
Shu-Zheng Zhou +2 more
doaj +1 more source
The extended Hubbard model with attractive interactions
Journal of Physics: Conference Series, 2018 To be submitted to the proceedings of CCP2017, to appear in Journal of Physics Conference Series (IOP); comments are ...
Loon, E.G.C.P van, Katsnelson, M.I.
openaire +3 more sources
Route to supersolidity for the extended Bose-Hubbard model
Physical Review A, 2011 We use the Gutzwiller ansatz and analyze the phase diagram of the extended Bose-Hubbard Hamiltonian with on-site (U) and nearest-neighbor (V) repulsions. For $d$-dimensional hypercubic lattices, when 2dV < U, it is well-known that the ground state alternates between the charge-density-wave (CDW) and Mott insulators, and the supersolid (SS) phase ...
openaire +6 more sources
SciPost Physics CoreWe examine the phase diagram of the extended Hubbard model on a square lattice, for both attractive and repulsive nearest-neighbor interactions, using CDMFT+HFD, a combination of Cluster Dynamical Mean Field theory (CDMFT) and a Hartree-Fock mean-field ...
Sarbajaya Kundu, David Sénéchal
doaj +1 more source
Coulomb localization in orbital degenerate, doped Mott insulators
AIP Advances, 2018 We study electron localization in a three-band extended Hubbard model describing the t2g electrons of doped vanadium perovskites such as La1−xCaxVO3, where Ca defects are represented by Coulomb potentials.
Adolfo Avella +2 more
doaj +1 more source
Extended Hubbard models, eta-pairing and supersymmetry
Journal of Low Temperature Physics, 1995 Exact results on extended Hubbard models are discussed. It is shown that condensation of local electron pairs at zero momentum constitutes a mechanism for superconductivity in a supersymmetric extended Hubbard model in any number of dimensions. The exact solution in one dimension is presented.
openaire +2 more sources
Ordering of Energy Levels for Extended SU(N) Hubbard Chain
Symmetry, Integrability and Geometry: Methods and Applications, 2010 The Lieb-Mattis theorem on the antiferromagnetic ordering of energy levels is generalized to SU(N) extended Hubbard model with Heisenberg exchange and pair-hopping terms.
Tigran Hakobyan
doaj +1 more source
SciPost PhysicsWe analyse the ground-state quantum phase diagram of hardcore Bosons interacting with repulsive dipolar potentials. The bosons dynamics is described by the extended-Bose-Hubbard Hamiltonian on a two-dimensional lattice.
J. A. Koziol, G. Morigi, K. P. Schmidt
doaj +1 more source
Realization of a Rydberg-dressed extended Bose-Hubbard model
ScienceThe competition of different length scales in quantum many-body systems leads to phenomena such as correlated dynamics and nonlocal order. To investigate such effects in an itinerant lattice-based quantum simulator, it has been proposed to introduce tunable extended-range interactions using off-resonant optical coupling to Rydberg states, known as ...
Pascal Weckesser +8 more
openaire +4 more sources
Long-Range Effects in Topologically Defective Arm-Chair Graphene Nanoribbons
NanomaterialsThe electronic structure of 7/9-AGNR superlattices with up to eight unit cells has been studied by means of state-of-the-art Density Functional Theory (DFT) and also by two model Hamiltonians, the first one including only local interactions (Hubbard ...
Enrique Louis +3 more
doaj +1 more source