Various Charge-Ordered States in the Extended Hubbard Model with On-Site Attraction in the Zero-Bandwidth Limit
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Superconductivity and Novel Magnetism"
DOI: 10.1007/s10948-016-3828-0
Abstract: The extended Hubbard model in the zero-bandwidth limit with intersite density–density interactions (nearest- and next-nearest-neighbor) is analyzed in the site-dependent mean-field approximation. In this paper, we investigate a case of on-site attraction U read more here.
Keywords: bandwidth limit; hubbard model; zero bandwidth; site attraction ... See more keywords
Validity of t–J approximation for extended Hubbard model with strong repulsion
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DOI: 10.1063/1.5010315
Abstract: It is shown that for finite cyclic systems described by two band Hubbard Hamiltonian with strong electron repulsion the reduction to effective t–J model may give incorrect description of the ground state symmetry due to… read more here.
Keywords: validity approximation; extended hubbard; model; approximation extended ... See more keywords
Effects of a k⃗-dependent Hybridisation on the Fermi surface of an extended d–p Hubbard model
Sign Up to like & getrecommendations! Published in 2019 at "Philosophical Magazine"
DOI: 10.1080/14786435.2020.1725252
Abstract: ABSTRACT The topology of the Fermi surface of an extended d–p Hubbard model is investigated using Green's function technique in a n-pole approximation. The effects of the d–p hybridisation on the Fermi surface are the… read more here.
Keywords: hybridisation; topology; extended hubbard; surface extended ... See more keywords
Interaction-induced two-photon edge states in an extended Hubbard model realized in a cavity array
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DOI: 10.1103/physreva.95.033831
Abstract: We study theoretically two-photon states in a periodic array of coupled cavities with both on-site and nonlocal Kerr-type nonlinearities. In the absence of nonlinearity the structure is topologically trivial and possesses no edge states. The… read more here.
Keywords: two photon; extended hubbard; hubbard model; edge states ... See more keywords
Photoinduced absorptions inside the Mott gap in the two-dimensional extended Hubbard model
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DOI: 10.1103/physrevb.96.195141
Abstract: We theoretically investigate pump-probe optical responses in the two-dimensional extended Hubbard model describing cuprates by using a time-dependent Lanczos method. At half filling, pumping generates photoinduced absorptions inside the Mott gap. A part of low-energy… read more here.
Keywords: mott; two dimensional; mott gap; extended hubbard ... See more keywords
Link auxiliary field method in the extended Hubbard model.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.107.025307
Abstract: The aim of this work is to generalize the method of Hubbard fields in fermion quantum Monte Carlo simulations to the case of link fields. The introduced Hubbard link fields play the role of the… read more here.
Keywords: link auxiliary; method extended; field method; extended hubbard ... See more keywords