Results 31 to 40 of about 6,166 (163)

Vertical and diagonal stripes in the extended Hubbard model [PDF]

physica status solidi (b), 2003
AbstractWe extend previous real‐space Hartree–Fock studies of static stripe stability to determine the phase diagram of the Hubbard model with anisotropic nearest‐neighbor hopping t, by varying the on‐site Coulomb repulsion U and investigating locally stable structures for representative hole doping levels x = 1/8 and x = 1/6.
Raczkowski, M., Normand, B., Oles, A. M.
openaire   +2 more sources

SUPERCONDUCTING COHERENT STATES FOR AN EXTENDED HUBBARD MODEL [PDF]

International Journal of Modern Physics B, 2003
An extended Hubbard model with phonons is considered. q-coherent states relative to the superconducting quantum symmetry of the model are constructed and their properties studied. It is shown that they can have energy expectation lower than eigenstates constructed via conventional processes and that they exhibit ODLRO.
Madouri, F., Hassouni, Y., Baz, M. El
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Phase diagram of the extended Bose–Hubbard model

New Journal of Physics, 2012
13 pages, 6 figures. To appear in NJP, in the focus issue on "Bose Condensation Phenomena in Atomic and Solid State Physics"
ROSSINI, DAVIDE, FAZIO, ROSARIO
openaire   +4 more sources

Phase diagram of a generalized Penson–Kolb–Hubbard chain with the occupation-dependent hopping

Results in Physics, 2023
At half filling, we study analytically a one-dimensional correlated electronic system modeled by an extended Penson–Kolb–Hubbard (PKH) chain with the occupation-dependent hopping.
Jing Yu, Hanqin Ding
doaj   +1 more source

Trimers in the extended Hubbard model

Physical Review B
10 pages, 10 ...
R. R. Montenegro-Filho, D. R. B. Silva, D. Cogollo, M. D. Coutinho-Filho   +3 more
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Topological phases arising from attractive interaction and pair hopping in the extended Hubbard model

New Journal of Physics, 2020
The extended Hubbard model with an attractive density–density interaction, positive pair hopping, or both, is shown to host topological phases, with a doubly degenerate entanglement spectrum and interacting edge spins.
Roman Rausch, Matthias Peschke
doaj   +1 more source

The one-dimensional extended Bose-Hubbard model [PDF]

Journal of Chemical Sciences, 2003
We use the finite-size, density-matrix-renormalization-group(DMRG) method to obtain the zero-temperature phase diagram of the one-dimensional, extended Bose-Hubbard model, for mean boson densityρ = 1, in theU-V plane (U andV are respectively, onsite and nearest-neighbour repulsive interactions between bosons). The phase diagram includes superfluid (SF),
Pai, Ramesh V, Pandit, Rahul
openaire   +2 more sources

One-Dimensional Alternating Extended Hubbard Model at Quarter-Filling and Its Applications to Structural Instabilities of Organic Conductors

Crystals, 2020
The one-dimensional extended Hubbard model with lattice dimerization and alternated site potentials is analyzed using the renormalization group method.
M. Ménard, C. Bourbonnais
doaj   +1 more source

Kondo frustration via charge fluctuations: a route to Mott localisation

New Journal of Physics, 2023
We propose a minimal effective impurity model that captures the phenomenology of the Mott–Hubbard metal–insulator transition of the half-filled Hubbard model on the Bethe lattice in infinite dimensions as observed by dynamical mean field theory (DMFT ...
Abhirup Mukherjee, N S Vidhyadhiraja, A Taraphder, Siddhartha Lal   +3 more
doaj   +1 more source

Optimized effective potential for the extended Hubbard model [PDF]

Physical Review B, 1999
21 page, 3 ...
openaire   +2 more sources