منابع مشابه
Mixed Phases for the t-J Model
We study the competition between non-magnetic (dimer or flux) states and short-range antiferromagnetically ordered RVB states in the t-J model and present a finite temperature phase diagram. We show that, for a wide range of temperatures and dopings, the stable phase results to be a state in which both the flux and the RVB parameters are nonzero. PACS: 71.27, 74.20. In this paper we want to ext...
متن کاملSe p 20 07 Two - electron bound state formation in the t − J − U model for exchange - coupled planes
An anisotropic t−J −U model Hamiltonian is used to model electron behaviour in quasi-2d materials in the dilute limit, and as a highly simplified representation of the weakly coupled CuO2 planes of the high-Tc cuprates we model the very poor out-ofplane conductivity via the complete suppression of interplanar hopping. However, we do include the very weak interplanar superexchange, and are thus ...
متن کاملNORMAL STATE PROPERTIES OF CUPRATES: t-J MODEL VS. EXPERIMENT
We discuss some recent results for the properties of doped antiferromagnets, obtained within the planar t-J model mainly by the finite-temperature Lanczos method, with the emphasis on the comparison with experimental results in cuprates. Among the thermodynamic properties the chemical potential and entropy are considered, as well as their relation to the thermoelectric power. At the intermediat...
متن کاملNormal State Property of the t-J Model
Using the spin-hole coherent state representation and taking a long range antiferromagnetic Nèel order as a background of the localized spin degree part, we have studied the normal state behavior of the t-J model, and shown that a strongly short-range antiferromagnetic correlation of the localized spin degree part is responsible for the anomalous non-Korringa-like relaxation behavior of the pla...
متن کامل2 Competing phases in the extended U - V - J Hubbard model near the van Hove fillings
The phase diagram of the two-dimensional extended one-band U-V-J Hub-bard model is considered within a mean-field approximation and two-and many-patch renormalization group (RG) approaches near the van Hove band fillings. At small t ′ and J > 0 mean-field and many-patch RG approaches give similar results for the leading spin-density-wave (SDW) instability, while the two-patch RG approach, which...
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ژورنال
عنوان ژورنال: Acta Physica Polonica A
سال: 2009
ISSN: 0587-4246,1898-794X
DOI: 10.12693/aphyspola.115.135