Journal ArticleDOI
Validity of the t-J model : quantum numbers for (Cu4O8)-7
TLDR
In this paper, the authors proposed a canonical transformation to eliminate the states containing Cu + and Cu +3 by means of a standard canonical transformation, and diagonalized the resulting effective Hamiltonian for a Cu 4 O 8 cluster with periodic boundary conditions, for zero and one added holes.About:
This article is published in Solid State Communications.The article was published on 1992-08-01. It has received 7 citations till now. The article focuses on the topics: Quantum number & Symmetry group.read more
Citations
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Nonequilibrium dynamics of a singlet-triplet Anderson impurity near the quantum phase transition.
P. Roura Bas,A. A. Aligia +1 more
TL;DR: The limits of integer valence of the STAM are derived and used to predict the behavior of the conductance through the system on both sides of the transition, where it jumps abruptly, and the spectral densities and conductance are calculated.
Journal ArticleDOI
Effective one-band hamiltonian for cuprate superconductor metal-insulator transition
TL;DR: In this paper, an effective one-band model Heff has been proposed, which is based on the three-band Hubbard hamiltonian H and projecting out of the Hilbert space a group of high-energy states, but the hopping terms depend on occupation numbers.
Journal ArticleDOI
Generalized One-Band Model Based on Zhang-Rice Singlets for Tetragonal CuO.
TL;DR: This work rigorously derive an effective one-band generalized t-J model for T-CuO, based on orthogonalized Zhang-Rice singlets, and makes an estimative calculation of its parameters, based upon previous ab initio calculations.
Journal ArticleDOI
Robust charge-density-wave correlations in the electron-doped single-band Hubbard model
Peizhi Mai,Nathan Nichols,Seher Karakuzu,Feng Bao,Adrian Del Maestro,Thomas Maier,Stephen S. Johnston +6 more
TL;DR: In this article , the authors study the finite temperature spin and charge correlations in the electron-doped single-band Hubbard model using quantum Monte Carlo dynamical cluster approximation calculations and contrast their behavior with those found on the holedoped side of the phase diagram and find evidence for a charge modulation with both checkerboard and unidirectional components decoupled from any spin-density modulations.
Journal ArticleDOI
Numerical comparison of the band structure and magnetic fluctuations of three-band and generalized t-J models
TL;DR: In this article, the quasiparticle band for a single hole doped into a CuO 2 plane described by the t -J (H tJ ) or generalized t-J model ( H tt ′ t ″ J ) in a periodic 4 × 4 cluster, and compare the results with those obtained by other authors for the spin-fermion model H sf, which in turn represents well the three-band Hubbard model.
References
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Journal ArticleDOI
Effective Hamiltonian for the superconducting Cu oxides
Fu-Chun Zhang,T. M. Rice +1 more
TL;DR: Although assuming that doping creates holes primarily on oxygen sites, this work derives explicitly a single-band effective Hamiltonian for the high-${T}_{c}$ Cu-oxide superconductors.
Book
Quantum Theory of Solids
TL;DR: In this paper, the Hartree-Forck approximation is used to calculate energy bands and Fermi Surfaces for semiconductor crystals. But the results of the energy bands do not cover the entire crystal lattice.
Journal ArticleDOI
Theory of high-Tc superconductivity in oxides.
TL;DR: In this article, it was shown that the properties of high-mathrm{T}$ oxide superconductors are consistent with a model in which the charge carriers are holes in the O(2p) states and the pairing is mediated by strong coupling to local spin configurations on the Cu sites.
Journal ArticleDOI
Two-dimensional antiferromagnetic quantum spin-fluid state in La2CuO
Gen Shirane,Y. Endoh,Robert J. Birgeneau,Marc Kastner,Yoshikazu Hidaka,Migaku Oda,M. Suzuki,Toshiaki Murakami +7 more
TL;DR: Elastic, quasielastic, and inelastic neutron scattering measurements in La 2 CuO 4 reveal novel two-dimensional antiferromagnetic behavior that is relevant to the high-temperature superconductivity in this class of materials.
Journal ArticleDOI
Evidence for holes on oxygen sites in the high- T c superconductors La 2 − x Sr x CuO 4 and YBa 2 Cu 3 O 7 − y
TL;DR: In this paper, the local oxygen density of states of p symmetry at the Fermi level was investigated as a function of x and y. The results indicated that for the superconductors and semiconducting compounds, the oxygen 2p band is probably completely filled.