Mean Field Studies of the 2 D Kondo Lattice Model
نویسنده
چکیده
We develop and study a model of the Kondo lattice system under the mean field approximation using a HartreeFock procedure as the spin polarization of the system is varied. The goal of this investigation is to provide a realistic model and a starting point for further investigations using more sophisticated techniques, as well as to provide information on mean field solutions calculated on larger lattice sizes. We compare energies for solutions of varied polarization and show that this model does generate known behavior of Kondo lattice systems.
منابع مشابه
ادغام الگوی شبکهای هولشتاین - کاندو برای توصیف نظریه ابررساناهای دمای بالا
It is a common knowledge that the formation of electron pairs is a necessary ingredient of any theoretical work describing superconductivity. Thus, finding the mechanism of the formation of the electron pairs is of utmost importance. There are some experiments on high transition temperature superconductors which support the electron-phonon (e-ph) interactions as the pairing mechanism (ARPES),...
متن کاملHOW THE KONDO EFFECT CAN EXIST IN Gd INTERMETALLIC COMPOUNDS
Based on the crystal and magnetic structural properties of some Gd intermetallic compounds, it is shown that with increasing conduction electron concentration, Gd experiences electronic and magnetic instability, and that these behaviors point to the appearance of Kondo Lattice. We suggest that the conduction electrons have gained local character. It is shown that Kondo effect should be observed...
متن کاملسیستمهای ناکام و همبسته الکترونی
Quantum phases and fluctuations in correlated electron systems with frustration and competing interactions are reviewed. In the localized moment case the S=1/2 J1 - J2 - model on a square lattice exhibits a rich phase diagram with magnetic as well as exotic hidden order phases due to the interplay of frustration and quantum fluctuations. Their signature in magnetocaloric quantities and the hig...
متن کاملLow-Energy Scales and Temperature-Dependent Photoemission of Heavy Fermions
We solve the S = 1/2 Kondo lattice model within the dynamical mean field theory. Detailed predictions are made for the dependence of the lattice Kondo resonance and the conduction electron spectral density on temperature and band filling, nc. Two low-energy scales are identified in the spectra: a renormalized hybridization pseudogap scale T , which correlates with the single-ion Kondo scale, an...
متن کاملLow energy scales of Kondo lattices: mean-field perspective
A review of the low temperature properties of Kondo lattice systems is presented within the mean-field approximation, focusing on the different characteristic energy scales. The Kondo temperature, TK , and the Fermi liquid coherence energy, T0, are analyzed as functions of the electronic filling, the shape of the noninteracting density of states, and the concentration of magnetic moments. These...
متن کامل