Canonical transformation of the three-band Hubbard model and hole pairing
TLDR
In this article, a canonical tranformation approach to the effective interaction between two holes, based on the three-band Hubbard model but ready to include extra interactions as well, was proposed.About:
This article is published in Solid State Communications.The article was published on 1998-12-18 and is currently open access. It has received 14 citations till now. The article focuses on the topics: Hubbard model & Canonical transformation.read more
Citations
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Dopant sites and structure in high Tc layered cuprates
TL;DR: In this paper, the phase diagrams of pseudogaps and superconductivity in La2-x,SrxCuO4 (LSCO) were discussed in the light of the EXAFS data.
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W=0 pairing in (N, N) carbon nanotubes away from half filling
TL;DR: In this paper, the authors used the Hubbard Hamiltonian H on the honeycomb lattice to represent the valence bands of carbon single-wall $(N,N)$ nanotubes.
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Symmetric Hubbard systems with superconducting magnetic response
TL;DR: In this article, the authors studied the tunneling of bound pairs in rings of 5-site units connected by weak intercell links, where each unit has the topology of a CuO4 cluster and a repulsive interaction is included on every site.
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Canonical Transformation of the Hubbard Model and W=0 Pairing: Comparison with Exact Diagonalization Results
TL;DR: In this paper, the Coulomb interaction effects on W = 0 pairs are dynamically small, and repulsive or attractive, depending on the filling, and the analytical approach allows us to identify the Cooper pairs.
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Repulsion-sustained supercurrent and flux quantization in rings of symmetric Hubbard clusters
TL;DR: In this paper, the response to a threading magnetic field of rings of five-site C4v-symmetric repulsive Hubbard clusters connected by weak intercell links is tested.
References
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Possible high Tc superconductivity in the Ba-La-Cu-O system
TL;DR: In this paper, Ba−La−Cu−O system, with the composition BaxLa5−xCu5O5(3−y) have been prepared in polycrystalline form, and samples with x=1 and 0.75,y>0, annealed below 900°C under reducing conditions, consist of three phases, one of them a perovskite-like mixed-valent copper compound.
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Spin-bag mechanism of high-temperature superconductivity.
TL;DR: In oxide superconductors the local suppression of antiferromagnetic correlations in the vicinity of a hole lowers the energy of the system, leading to a quasi two-dimensional bag of weakened spin order that follows the hole in its motion.
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Conserving approximations for strongly fluctuating electron systems. II. Numerical results and parquet extension.
N. E. Bickers,Steven R. White +1 more
TL;DR: Description d'une technique iterative pour the resolution des equations de Dominicis-Martin pour des electrons de reseau a partir d'un approximation de pseudopotentiel.
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Weak Pseudogap Behavior in the Underdoped Cuprate Superconductors
TL;DR: In this paper, a solution of the nearly antiferromagnetic (AF) spin fermion model was proposed, which demonstrates that the broad high energy features found in angular resolved photoemission spectroscopy measurements of the spectral density of the underdoped cuprates are determined by strong correlations and precursor effects of a spin density wave state.